Contingent Valuation Method(CVM) was used to investigate the Chinese public's willingness to pay(WTP) for a policy to reduce CO2 emissions. Face to face interviews were conducted to collect 1,653 valid questionnai...Contingent Valuation Method(CVM) was used to investigate the Chinese public's willingness to pay(WTP) for a policy to reduce CO2 emissions. Face to face interviews were conducted to collect 1,653 valid questionnaires from Beijing, Shanghai, Shandong province, and Fujian province. A model was constructed to understand the factors that influence WTP. The results indicate that the Chinese public is willing to pay CN 201.86 annually to support the policy of reducing greenhouse gas emissions. Participants from Beijing show the highest WTP, followed by participants from Fujian and Shandong, while those from Shanghai report the lowest WTP. The findings reveal that participants with higher income, higher satisfaction with their current life, and awareness of climate issues are willing to pay more for CO2 emissions reductions. In addition, those who are young, male and members of the Communist Party also indicate a higher WTP. The results imply that translating the public's willingness to protect climate into actions should be taken into account in China's low carbon policy. There is a need to consider the difference in degree of willingness, among different social groups, to pay for emissions reductions if the market-based mechanisms such as carbon tax were designed to facilitate emissions reductions.展开更多
The preservation/restoration of natural environment is frequently entailing excessive cost （paid by people through taxation） while it is a source of additional income for both, the State and the people, due to touri...The preservation/restoration of natural environment is frequently entailing excessive cost （paid by people through taxation） while it is a source of additional income for both, the State and the people, due to tourism. Since the evaluation of this good cannot be in market terms, it is applied here in a modified version of the CVM （Contingent Valuation Method）, which is used in experimental economics in order to investigate the significance that people put on this good and how much they might be WTP （Willing to Pay） for supporting activities concerning the preservation/restoration of Lake Kastoria. The WTP dependence on （i） external diseconomies; （ii） the expectations for property values＇ rise as a result of the restoration; （iii） the proximity of interviewees＇ residence to the lake; （iv） the opinion of the interviewee on the time and money spent to visit the lake; （v） the time and money the interviewees spent to visit the lake, as well as other dependencies （all taken as independent variables） are estimated by means oflogit, probit, logistic and linear regression models. The optimal concentration Copt of a pollutant in the environment can be determined as an equilibrium point in the tradeoff between （i） environmental cost, due to impact on man/ecosystem/economy; and （ii） economic cost for environmental protection, as it can be expressed by Pigouvian tax. These two conflict variables are internalized within the same techno-economic objective function of total cost, which is minimized. In this work, the first conflict variable is represented by a WTP index. A methodology is developed for the estimation of this index by using fuzzy sets to count for uncertainty. Implementation of this methodology is presented, concerning odor pollution of air round an olive pomace oil mill.展开更多
On the basis of questionnaire survey,by adopting Contingent Valuation Method,residents' WTP for the protection of Yellow River Hoodoo National Geopark in Longwan Village,Jingtai County of Gansu Province was invest...On the basis of questionnaire survey,by adopting Contingent Valuation Method,residents' WTP for the protection of Yellow River Hoodoo National Geopark in Longwan Village,Jingtai County of Gansu Province was investigated.The result showed that tourism development had greatly influenced local society,economy and culture.Residents in this area had a strong awareness of all the factors above mentioned and showed a positive attitude.Local residents would definitely like to provide a certain degree of labor or money to promote the development of tourism,which was different from the residents' attitude of developed countries.To some extent,it reflected the characteristics of tourism development in developing countries.However,the result of this paper that demographic among residents had little effect on WTP also differed from previous researches.The improvement of living standard and residents' consciousness of environmental protection were the main reasons affecting residents' WTP.Besides,the amount of payment was also in remarkable correlation with the improvement of living standard and the destruction degree of local ecological environment.展开更多
China has become an increasingly popular destination for expats with thousands arriving every year to take up opportunities in education and work.If you were to poll foreigners living in China what their main concern ...China has become an increasingly popular destination for expats with thousands arriving every year to take up opportunities in education and work.If you were to poll foreigners living in China what their main concern about living in China is,it展开更多
Ecotourism has been considered as the impetus and economic investment for management of natural resources. The current research uses data mining from the recreation values of Iran＇s parks and separating influential f...Ecotourism has been considered as the impetus and economic investment for management of natural resources. The current research uses data mining from the recreation values of Iran＇s parks and separating influential factors on visitors＇ willingness to pay （WTP）. This study delves into the main findings of 31 researches applied to assess the recreation value of 33 different parks across Iran from 2004 to 2011. Those researches collected 9,216 questionnaires in total. It was conducted using R software and Rattle user interface to analyze gathered data and information. Results showed that 69% of respondents were male. The averages of age and academic years were 34.4 and 13.7 respectively. The majority of the visitors were willing to pay money to visit the parks. Variables of education levels, household size, marital status, age, and bid amount had an effect on visitors＇ rate of WTP for visiting, and variables of gender, education levels, and marital status affected the general amount of WTP. The average amount of WTP per person was estimated at US $1.4, and the average annual recreation value for each hectare of parks was calculated at US $2,313. This study provides justification for the decision to support the quality of Iran＇s parks.展开更多
The“social contract”is the most famous philosophical text of Zac Jacques Roussos,which was to influence the intellectual and political movement of the 18th century.By publishing the“social contract”or“Civil Law P...The“social contract”is the most famous philosophical text of Zac Jacques Roussos,which was to influence the intellectual and political movement of the 18th century.By publishing the“social contract”or“Civil Law Principles”in 1762,Rousseau,presenting his theory of the state and seeking the foundation of civil society,attempts to expose the conditions of a stable and just state by putting freedom as a precondition for law and the common good must be lawful.A central place in its political theory is the concept of general will,which is in the general interest(otherwise the common good)and on which the idea of a favored constitutional state is based.We estimate approximately the size of the external economy by the method of the Contingent Valuation Method(CVM).The Contingent Valuation Method(CVM)is a survey-based technique,frequently used in Experimental Economics,especially useful for the valuation of non-market resources/goods/services,and cultural heritage objects(of aesthetic,historic,scientific,or social value),such as conservation of monumental remains and preservation of the physical and anthropogenic environment.展开更多
The In most contingent valuation (CV) studies, WTP (Willingness to pay) and WTA (Willingness to accept) were often used separately, so protesting or no response or even babbling answers are increasing, and the debate ...The In most contingent valuation (CV) studies, WTP (Willingness to pay) and WTA (Willingness to accept) were often used separately, so protesting or no response or even babbling answers are increasing, and the debate persists over the reliability of CV in economic policy analysis. In order to improve the reliability of CV, WTP and WTA is used syn-chronously to estimate the restoration cost of Maqu grassland ecosystem. Data were partly from questionnaire survey, and partly from interviews and authorities. Before conclusions were derived, we assumed these data that came from interviews and authorities were right. The main result is: If we assumed that the degraded grassland of Maqu needs 10 years to be restored, and divided the restoring period into two stages, then the restoration cost was 0.85 × 108 RMB per year in former 4 years, 0.022 × 108 RMB per year in latter 6 years. The total cost of Maqu grassland restoration was 3.62 × 108 RMB. For all the costs of restoration, WTA occupied 94% and WTP only occupied 6%, suggesting that local grassland degradation was mainly caused by overgrazing and that the overloading livestock must be eliminated in order to achieve restoration successfully. Our research also showed that combining WTP and WTA in contingent valuation is very useful in estimating the cost of environmental improvement projects. Of course, whether these results are right or not, further researches are needed in the future, especially for the actual number of livestock in Maqu grassland.展开更多
The subject of this study, which involves two surveys, is to estimate externalities created round a cultural heritage preservation site by means of a CVM （Contingent Valuation Method）. The first survey was conducted...The subject of this study, which involves two surveys, is to estimate externalities created round a cultural heritage preservation site by means of a CVM （Contingent Valuation Method）. The first survey was conducted for the ruins of ancient ＂Diolkos＂ located in Isthmus of Corinth, Greece using a sample of 200 soldiers. The second survey was conducted for the ancient theater of Lefkada, using a sample of 100 tourists mad locals. The results have been analyzed with Logit model regression. The findings show that willingness to pay （or participate） is strongly affected by opportunity cost and awareness of the site＇s history. Further, income level and education level play a critical role in developing volunteering activity.展开更多
[Objective] This study was to analyze the personal Willingness to Pay （WI-P） on the non-use value of Dianchi lake wetland and the influential factors. [Method] Questionnaire was designed according to the Contingent ...[Objective] This study was to analyze the personal Willingness to Pay （WI-P） on the non-use value of Dianchi lake wetland and the influential factors. [Method] Questionnaire was designed according to the Contingent Valuation Method （CVM） to investigate people of different occupations at different ages, based on which the evaluation on non-use value of Dianchi lake wetland was carried out. And the relationship between WTP and social characteristics were analyzed by using non- parametric estimation. [Result] The average WTP on Dianchi lake wetland is 150.03- 217.66 yuan per person every year, and the total WTP is 626-909 million yuan ev- ery year. Age, education and residence of the respondents have remarkable influ- ence on the VVTP. The influence of education level and residence on option value is significant; bequest value is significantly correlated with age; while there is no significant relationship between existence value and social characteristics. [Conclusion] The evaluation on the non-use value of Dianchi lake wetland is important for the scientific development and utilization of wetland resources.展开更多
World heritage possesses various kinds of use value and non-use value. Measuring the recreational value of world heritage sites is a key issue in the heritage tourism. This paper employs Contingent Valuation Method (C...World heritage possesses various kinds of use value and non-use value. Measuring the recreational value of world heritage sites is a key issue in the heritage tourism. This paper employs Contingent Valuation Method (CVM), which is an evaluation instrument on the basis of tourists′ attitude and preference, to measure the recreational value of Jiuzhaigou, one of the World Natural Heritage sites in China, and analyzes the biases in the survey. The results show that: 1) In 2009, Jiuzhaigou′s recreational value was 3.46×108 yuan (RMB), and the per capita Willingness to Pay (WTP) was 137.31 yuan by CVM. Compared with the results of other methods, this result is significantly low. 2) Among the factors that influence Jiuzhaigou tourists′ WTP, psychological perception factors have the greatest effect while demographic and socio-economic characteristics have a small effect on WTP. 3) The virtuality in CVM creates biases both from CVM itself and in the procedures that CVM was implemented. The former includes hypothetical bias, information bias, protest response bias, and strategic bias; and the latter includes the questionnaire design, population and sample definition, sampling and data processing. The paper analyses those biases and illustrates their potential in-fluences on the accuracy of CVM measurement. 4) Although there are various defects in CVM measurement, it is still an effective valuation method.展开更多
The purpose of this study is to provide an evaluation of the possible criteria used by the people of Thessaloniki for the evaluation of public goods and the investigation of the benefits of the conservation and restor...The purpose of this study is to provide an evaluation of the possible criteria used by the people of Thessaloniki for the evaluation of public goods and the investigation of the benefits of the conservation and restoration of city structures affected by carbon monoxide. These benefits are expressed in monetary units by using the CVM （Contingent Valuation Method）. The maintenance of the urban environment often entails excessive costs paid by the people through taxation. A city free of aesthetic pollution results in an increase in tourism. A portion of taxation paid by the citizens is allocated to cleaning the city. An increase in tourism provides the government with additional revenue through VAT （Value Added Taxes）. The main findings show that in a large proportion, 28% of the interviewees are willing to pay, but those that are willing to pay significant amounts tend to prefer mild interventions to the buildings, while those （42%） that agree with minimal to null amount demand radical intervention. The latter group, also, considers any contribution of theirs to restoration as unfair, judging that this expenditure should be covered exclusively by the State. Last but not least, from a sociopsychological point of view, this attitude could be attributed to extreme personalities which tend to prefer more holistic and direct solutions （i.e., no mixed strategy involving people and the State is acceptable by interviewees who considered themselves as having no further obligations after regular tax-paying）; as a result, they think that the State is exclusively responsible to resolve the situation.展开更多
Recently, 90 tons of human waste per day are collected from private residences, offices, and public facilities in Da Nang City. Meanwhile, farmers in this region have to allocate 10% - 20% of rice sales for purchasing...Recently, 90 tons of human waste per day are collected from private residences, offices, and public facilities in Da Nang City. Meanwhile, farmers in this region have to allocate 10% - 20% of rice sales for purchasing chemical fertilizer. Therefore, it is essential to be adopted more inexpensive organic fertilizer. To deal with these problems, Japan International Cooperation Agency (JICA) has signed a contract with Da Nang city government about human waste treatment and production of organic biomass liquid fertilizer (OBLF) in 2015. The aims of this project are to promote the use of OBLF in farming and improve public awareness of environmental protection. 530 respondents were interviewed at Hoa Vang districts of Da Nang city, and data was analyzed by Contingent Valuation Method (CVM) under double bounded dichotomous choice approach. The results have revealed that 436 respondents (82%) agreed to use OBLF. The farmers’ WTP depends on factors including household income, experience in using organic fertilizer, awareness of environment and training of organic fertilizer in the past. The estimated price for OBLF was 94,856 VND (4.0 USD)/ton. The cost that farmers paid for OBLF was lower than that of current available chemical fertilizers in Da Nang city. This proves that marketability seems to be existed for OBLF product in Da Nang city. From these findings, the government should have policies to support and subsidize the farmers to encourage them to use OBLF in a large scale of cultivation. Furthermore, establishment of a market to consume the organic products harvested from cultivated areas using OBLF is also recommended.展开更多
Despite widespread concerns and elevated policy debates, little is known about the Chinese public＇s perceptions of water pollution and willingness to cooperate with government policies. Based on survey data, this stu...Despite widespread concerns and elevated policy debates, little is known about the Chinese public＇s perceptions of water pollution and willingness to cooperate with government policies. Based on survey data, this study examined Lake Tai resident perception of water pollution, willingness to pay （WTP） for water quality improvements, and its influencing factors. Contingent valuation （CV） results showed that respondents would prefer to pay 141 CNY per household a year, approximately 0.70% of their annual per capita disposable income, as an environmental fee to improve water quality in Lake Yai. Aggregate WTP for all five lakeside cities of Lake Tai was estimated at about 3.8 billion CNY, without discounts, in the next ten years. WTP was found to increase with income and female respondents were willing to pay more than males. Those respondents who were dissatisfied with water quality were more likely to pay more. The usage of Lake Tai did not strongly affect WTE展开更多
基金supported by the Foundation of the Humanities and Social Science, Ministry of Education of the People’s Republic of China (No. 09YJA790119)
文摘Contingent Valuation Method(CVM) was used to investigate the Chinese public's willingness to pay(WTP) for a policy to reduce CO2 emissions. Face to face interviews were conducted to collect 1,653 valid questionnaires from Beijing, Shanghai, Shandong province, and Fujian province. A model was constructed to understand the factors that influence WTP. The results indicate that the Chinese public is willing to pay CN 201.86 annually to support the policy of reducing greenhouse gas emissions. Participants from Beijing show the highest WTP, followed by participants from Fujian and Shandong, while those from Shanghai report the lowest WTP. The findings reveal that participants with higher income, higher satisfaction with their current life, and awareness of climate issues are willing to pay more for CO2 emissions reductions. In addition, those who are young, male and members of the Communist Party also indicate a higher WTP. The results imply that translating the public's willingness to protect climate into actions should be taken into account in China's low carbon policy. There is a need to consider the difference in degree of willingness, among different social groups, to pay for emissions reductions if the market-based mechanisms such as carbon tax were designed to facilitate emissions reductions.
文摘The preservation/restoration of natural environment is frequently entailing excessive cost （paid by people through taxation） while it is a source of additional income for both, the State and the people, due to tourism. Since the evaluation of this good cannot be in market terms, it is applied here in a modified version of the CVM （Contingent Valuation Method）, which is used in experimental economics in order to investigate the significance that people put on this good and how much they might be WTP （Willing to Pay） for supporting activities concerning the preservation/restoration of Lake Kastoria. The WTP dependence on （i） external diseconomies; （ii） the expectations for property values＇ rise as a result of the restoration; （iii） the proximity of interviewees＇ residence to the lake; （iv） the opinion of the interviewee on the time and money spent to visit the lake; （v） the time and money the interviewees spent to visit the lake, as well as other dependencies （all taken as independent variables） are estimated by means oflogit, probit, logistic and linear regression models. The optimal concentration Copt of a pollutant in the environment can be determined as an equilibrium point in the tradeoff between （i） environmental cost, due to impact on man/ecosystem/economy; and （ii） economic cost for environmental protection, as it can be expressed by Pigouvian tax. These two conflict variables are internalized within the same techno-economic objective function of total cost, which is minimized. In this work, the first conflict variable is represented by a WTP index. A methodology is developed for the estimation of this index by using fuzzy sets to count for uncertainty. Implementation of this methodology is presented, concerning odor pollution of air round an olive pomace oil mill.
基金Supported by State National Sciences Foundation(50879033)~~
文摘On the basis of questionnaire survey,by adopting Contingent Valuation Method,residents' WTP for the protection of Yellow River Hoodoo National Geopark in Longwan Village,Jingtai County of Gansu Province was investigated.The result showed that tourism development had greatly influenced local society,economy and culture.Residents in this area had a strong awareness of all the factors above mentioned and showed a positive attitude.Local residents would definitely like to provide a certain degree of labor or money to promote the development of tourism,which was different from the residents' attitude of developed countries.To some extent,it reflected the characteristics of tourism development in developing countries.However,the result of this paper that demographic among residents had little effect on WTP also differed from previous researches.The improvement of living standard and residents' consciousness of environmental protection were the main reasons affecting residents' WTP.Besides,the amount of payment was also in remarkable correlation with the improvement of living standard and the destruction degree of local ecological environment.
文摘China has become an increasingly popular destination for expats with thousands arriving every year to take up opportunities in education and work.If you were to poll foreigners living in China what their main concern about living in China is,it
文摘Ecotourism has been considered as the impetus and economic investment for management of natural resources. The current research uses data mining from the recreation values of Iran＇s parks and separating influential factors on visitors＇ willingness to pay （WTP）. This study delves into the main findings of 31 researches applied to assess the recreation value of 33 different parks across Iran from 2004 to 2011. Those researches collected 9,216 questionnaires in total. It was conducted using R software and Rattle user interface to analyze gathered data and information. Results showed that 69% of respondents were male. The averages of age and academic years were 34.4 and 13.7 respectively. The majority of the visitors were willing to pay money to visit the parks. Variables of education levels, household size, marital status, age, and bid amount had an effect on visitors＇ rate of WTP for visiting, and variables of gender, education levels, and marital status affected the general amount of WTP. The average amount of WTP per person was estimated at US $1.4, and the average annual recreation value for each hectare of parks was calculated at US $2,313. This study provides justification for the decision to support the quality of Iran＇s parks.
文摘The“social contract”is the most famous philosophical text of Zac Jacques Roussos,which was to influence the intellectual and political movement of the 18th century.By publishing the“social contract”or“Civil Law Principles”in 1762,Rousseau,presenting his theory of the state and seeking the foundation of civil society,attempts to expose the conditions of a stable and just state by putting freedom as a precondition for law and the common good must be lawful.A central place in its political theory is the concept of general will,which is in the general interest(otherwise the common good)and on which the idea of a favored constitutional state is based.We estimate approximately the size of the external economy by the method of the Contingent Valuation Method(CVM).The Contingent Valuation Method(CVM)is a survey-based technique,frequently used in Experimental Economics,especially useful for the valuation of non-market resources/goods/services,and cultural heritage objects(of aesthetic,historic,scientific,or social value),such as conservation of monumental remains and preservation of the physical and anthropogenic environment.
文摘The In most contingent valuation (CV) studies, WTP (Willingness to pay) and WTA (Willingness to accept) were often used separately, so protesting or no response or even babbling answers are increasing, and the debate persists over the reliability of CV in economic policy analysis. In order to improve the reliability of CV, WTP and WTA is used syn-chronously to estimate the restoration cost of Maqu grassland ecosystem. Data were partly from questionnaire survey, and partly from interviews and authorities. Before conclusions were derived, we assumed these data that came from interviews and authorities were right. The main result is: If we assumed that the degraded grassland of Maqu needs 10 years to be restored, and divided the restoring period into two stages, then the restoration cost was 0.85 × 108 RMB per year in former 4 years, 0.022 × 108 RMB per year in latter 6 years. The total cost of Maqu grassland restoration was 3.62 × 108 RMB. For all the costs of restoration, WTA occupied 94% and WTP only occupied 6%, suggesting that local grassland degradation was mainly caused by overgrazing and that the overloading livestock must be eliminated in order to achieve restoration successfully. Our research also showed that combining WTP and WTA in contingent valuation is very useful in estimating the cost of environmental improvement projects. Of course, whether these results are right or not, further researches are needed in the future, especially for the actual number of livestock in Maqu grassland.
文摘The subject of this study, which involves two surveys, is to estimate externalities created round a cultural heritage preservation site by means of a CVM （Contingent Valuation Method）. The first survey was conducted for the ruins of ancient ＂Diolkos＂ located in Isthmus of Corinth, Greece using a sample of 200 soldiers. The second survey was conducted for the ancient theater of Lefkada, using a sample of 100 tourists mad locals. The results have been analyzed with Logit model regression. The findings show that willingness to pay （or participate） is strongly affected by opportunity cost and awareness of the site＇s history. Further, income level and education level play a critical role in developing volunteering activity.
基金Supported by the "Research on Benefit Evaluation and Management Plan of Dianchi Lake Wetland" Project of Jiuhu Office,Yunnan Province,Chinathe Technology R&D Program for Social Development of Yunnan Province (2008ZC064M),China~~
文摘[Objective] This study was to analyze the personal Willingness to Pay （WI-P） on the non-use value of Dianchi lake wetland and the influential factors. [Method] Questionnaire was designed according to the Contingent Valuation Method （CVM） to investigate people of different occupations at different ages, based on which the evaluation on non-use value of Dianchi lake wetland was carried out. And the relationship between WTP and social characteristics were analyzed by using non- parametric estimation. [Result] The average WTP on Dianchi lake wetland is 150.03- 217.66 yuan per person every year, and the total WTP is 626-909 million yuan ev- ery year. Age, education and residence of the respondents have remarkable influ- ence on the VVTP. The influence of education level and residence on option value is significant; bequest value is significantly correlated with age; while there is no significant relationship between existence value and social characteristics. [Conclusion] The evaluation on the non-use value of Dianchi lake wetland is important for the scientific development and utilization of wetland resources.
基金Under the auspices of Sino-British Fellowship by the British Academy (No. SG-47266)National Natural Science Foundation of China (No. 40371030)
文摘World heritage possesses various kinds of use value and non-use value. Measuring the recreational value of world heritage sites is a key issue in the heritage tourism. This paper employs Contingent Valuation Method (CVM), which is an evaluation instrument on the basis of tourists′ attitude and preference, to measure the recreational value of Jiuzhaigou, one of the World Natural Heritage sites in China, and analyzes the biases in the survey. The results show that: 1) In 2009, Jiuzhaigou′s recreational value was 3.46×108 yuan (RMB), and the per capita Willingness to Pay (WTP) was 137.31 yuan by CVM. Compared with the results of other methods, this result is significantly low. 2) Among the factors that influence Jiuzhaigou tourists′ WTP, psychological perception factors have the greatest effect while demographic and socio-economic characteristics have a small effect on WTP. 3) The virtuality in CVM creates biases both from CVM itself and in the procedures that CVM was implemented. The former includes hypothetical bias, information bias, protest response bias, and strategic bias; and the latter includes the questionnaire design, population and sample definition, sampling and data processing. The paper analyses those biases and illustrates their potential in-fluences on the accuracy of CVM measurement. 4) Although there are various defects in CVM measurement, it is still an effective valuation method.
文摘The purpose of this study is to provide an evaluation of the possible criteria used by the people of Thessaloniki for the evaluation of public goods and the investigation of the benefits of the conservation and restoration of city structures affected by carbon monoxide. These benefits are expressed in monetary units by using the CVM （Contingent Valuation Method）. The maintenance of the urban environment often entails excessive costs paid by the people through taxation. A city free of aesthetic pollution results in an increase in tourism. A portion of taxation paid by the citizens is allocated to cleaning the city. An increase in tourism provides the government with additional revenue through VAT （Value Added Taxes）. The main findings show that in a large proportion, 28% of the interviewees are willing to pay, but those that are willing to pay significant amounts tend to prefer mild interventions to the buildings, while those （42%） that agree with minimal to null amount demand radical intervention. The latter group, also, considers any contribution of theirs to restoration as unfair, judging that this expenditure should be covered exclusively by the State. Last but not least, from a sociopsychological point of view, this attitude could be attributed to extreme personalities which tend to prefer more holistic and direct solutions （i.e., no mixed strategy involving people and the State is acceptable by interviewees who considered themselves as having no further obligations after regular tax-paying）; as a result, they think that the State is exclusively responsible to resolve the situation.
文摘Recently, 90 tons of human waste per day are collected from private residences, offices, and public facilities in Da Nang City. Meanwhile, farmers in this region have to allocate 10% - 20% of rice sales for purchasing chemical fertilizer. Therefore, it is essential to be adopted more inexpensive organic fertilizer. To deal with these problems, Japan International Cooperation Agency (JICA) has signed a contract with Da Nang city government about human waste treatment and production of organic biomass liquid fertilizer (OBLF) in 2015. The aims of this project are to promote the use of OBLF in farming and improve public awareness of environmental protection. 530 respondents were interviewed at Hoa Vang districts of Da Nang city, and data was analyzed by Contingent Valuation Method (CVM) under double bounded dichotomous choice approach. The results have revealed that 436 respondents (82%) agreed to use OBLF. The farmers’ WTP depends on factors including household income, experience in using organic fertilizer, awareness of environment and training of organic fertilizer in the past. The estimated price for OBLF was 94,856 VND (4.0 USD)/ton. The cost that farmers paid for OBLF was lower than that of current available chemical fertilizers in Da Nang city. This proves that marketability seems to be existed for OBLF product in Da Nang city. From these findings, the government should have policies to support and subsidize the farmers to encourage them to use OBLF in a large scale of cultivation. Furthermore, establishment of a market to consume the organic products harvested from cultivated areas using OBLF is also recommended.
基金Project supported by the National Natural Science Foundation of China (No. 70873107)the National Basic Research Program (973) of China (No. 2005CB121104)
文摘Despite widespread concerns and elevated policy debates, little is known about the Chinese public＇s perceptions of water pollution and willingness to cooperate with government policies. Based on survey data, this study examined Lake Tai resident perception of water pollution, willingness to pay （WTP） for water quality improvements, and its influencing factors. Contingent valuation （CV） results showed that respondents would prefer to pay 141 CNY per household a year, approximately 0.70% of their annual per capita disposable income, as an environmental fee to improve water quality in Lake Yai. Aggregate WTP for all five lakeside cities of Lake Tai was estimated at about 3.8 billion CNY, without discounts, in the next ten years. WTP was found to increase with income and female respondents were willing to pay more than males. Those respondents who were dissatisfied with water quality were more likely to pay more. The usage of Lake Tai did not strongly affect WTE
