As for the supply chain consisting of a manufacturer and multiple competing retailers, the disruption management decision is considered for the demand disruption that both the investment sensitivity coefficient and th...As for the supply chain consisting of a manufacturer and multiple competing retailers, the disruption management decision is considered for the demand disruption that both the investment sensitivity coefficient and the investment-elasticity are changed simultaneously. Meanwhile, the corresponding solutions are given for different cases of the disruption, and the characteristics of the solutions are analyzed. The production plan is proved to he robustness under certain conditions, and the production plan of the coordination strategy is investigated for the disruption with appropriate contractual arrangement, i. e. , a subside rate schedule. Mutual restraints exist between the changed investment sensitivity coefficient and the investment-elasticity when the coordination mecha- nism is used. And the more the number of the retailers in the system, the more the subside provided by the suppler on the coordinaton strategy.展开更多
A thorough investigation was carried out to the pond resources of a county, and Grossman-Hart-Moore (GHM) incomplete contract theory was used to do the economic analysis on the idle pond resources. The result indica...A thorough investigation was carried out to the pond resources of a county, and Grossman-Hart-Moore (GHM) incomplete contract theory was used to do the economic analysis on the idle pond resources. The result indicated that with the deepening of market-oriented economy, the human asset specificity under the incomplete contract had distorted the investment incentives to the governance of ponds that corresponding policies were required to govern the idle ponds.展开更多
The challenge for supply chain management is to create appropriate supply chain contracts so as to optimize the system performance. To examine the role of asymmetric information in a two-echelon supply chain system an...The challenge for supply chain management is to create appropriate supply chain contracts so as to optimize the system performance. To examine the role of asymmetric information in a two-echelon supply chain system and derive supply chain contracts to deal with existing asymmetric information, a two level supply chain model including one Supplier and one retailer under the demand of price elasticity is developed. By using the principalagent principle and the optimal control theory, three types of supply chain contract, i. e. , a wholesale pricing contract, a two-parameter linear and a two-parameter nonlinear contracts are obtained. In these contracts, the Supplier has asymmetric information about the retailer cost structure. Simulation results show that the two-parameter contracts are more effective strategies to achieve supply chain coordination.展开更多
The double moral hazard of "company + farmer" and the time preference cost of company and farmer was analyzed. According to static game model, it re-vealed that the reason for low compliance rate of "company + fa...The double moral hazard of "company + farmer" and the time preference cost of company and farmer was analyzed. According to static game model, it re-vealed that the reason for low compliance rate of "company + farmer" model was the existence of market risk, namely, the fluctuation of market price, and the stable market price in contracts was actualy a kind of interval, instead of a specific value. Furthermore, the effect of default penalty, market transaction cost and time prefer-ence cost on the stability of contract was studied. The results showed that default penalty, market transaction cost and time preference cost had positive influence on the price interval range of a contract.展开更多
In order to curb the manufacturer’s product carbon emission levels, the leading retailer usually offers three contracts to the manufacturer, i.e., wholesale-price contract(WC), cost-sharing contract(CC) and revenue-s...In order to curb the manufacturer’s product carbon emission levels, the leading retailer usually offers three contracts to the manufacturer, i.e., wholesale-price contract(WC), cost-sharing contract(CC) and revenue-sharing contract(RC). The results of implementing the three contracts are discussed and compared. The results reveal that as long as the government levies carbon taxations, all the three contracts can effectively stimulate the manufacturer to invest in carbon emission reduction. Among the three contracts, RC can achieve the highest level of carbon emission reduction of products and the maximum profits for both the manufacturer and retailer in a supply chain. However, the RC fails to reach the level of the centralized supply chain(CSC), thus it cannot coordinate the supply chain. The supply chain members’ contract choices are consistent. Both members prefer RC to the other two contracts. In order to effectively reduce the manufacturer’s carbon emission levels, the government should impose the highest carbon taxation level under RC, the medium carbon taxation level under CC, the lowest carbon taxation level under WC, and the same carbon taxation level as RC under the CSC.展开更多
By inserting the variable of the exactness of corporate valuation into the classic model of Contract Theory, this paper, on the bases of the interaction of the variables of the veraciousness of corporate valuation, ma...By inserting the variable of the exactness of corporate valuation into the classic model of Contract Theory, this paper, on the bases of the interaction of the variables of the veraciousness of corporate valuation, managerial incentives and operational risks, explores the deep-seated reasons for changes in corporate structures, and draws the conclusion that the divestment of the subsidiary is beneficial to shareholders when the parent corporate is undervalued and that the relation between the parent and the subsidiary is disordered, or vice versa. This conclusion is consistent with the motives of many divestiture cases in reality.展开更多
A vector autoregressive model was developed for a sample of container carrier time charter rates. Although the series of time charter rates are themselves found non-stationary, thus precluding the use of many modeling...A vector autoregressive model was developed for a sample of container carrier time charter rates. Although the series of time charter rates are themselves found non-stationary, thus precluding the use of many modeling methodologies, evidence provided by co-integration tests points to the existence of stable long-term relationships between the series. An assessment of the forecasts derived from the model suggests that the spec-ification of these long-term relationships does not improve the accuracy of long-term forecasts. These results are interpreted as a corroboration of the efficient market hypothesis.展开更多
In the global supply chain in a setting characterized by exchange rate uncertainties,it is quite necessary to focus on comparative research trying to find out which kind of purchasing strategy is better in different s...In the global supply chain in a setting characterized by exchange rate uncertainties,it is quite necessary to focus on comparative research trying to find out which kind of purchasing strategy is better in different situations.The two common global purchasing strategies,risk sharing(RS)and quantity flexibility(QF),are selected to be compared.Using a real-options approach,the valuation models of RS and QF purchasing contracts are established.By means of binomial lattice technique,numerical simulation and sensitivity analysis of two stochastic dynamic programs are presented.The effects on expected discounted value by changing relative parameters are described clearly.Based on comparative analysis,it is concluded that the QF purchasing strategy is better than that of the RS especially where great volatility exists for exchange rate processes in the global supply chain.展开更多
Abstract: Contractual savings scheme is specific purpose saving, which was provided in Slovakia since 1993. It is a state-supported saving, the purpose of which is to finance housing needs in the Slovak Republic. Sav...Abstract: Contractual savings scheme is specific purpose saving, which was provided in Slovakia since 1993. It is a state-supported saving, the purpose of which is to finance housing needs in the Slovak Republic. Savers can be an individual, association of owners or legal person who enters into a contract with building society or for whom the contract about contractual savings scheme is concluded. State bonuses is contractual savings scheme, a significantly more attractive form of targeted saving. This ensures the supply of investment in the construction sector, which in turn through multiplier effect significantly affects other sectors of the national economy. In this article, the authors deal with the influence of contractual savings scheme to the national economy of the Slovak Republic. The main objective of this study is describing the effectiveness of state bonuses for contractual savings scheme. It is simulated through the impact of contractual savings scheme on employment, on public funds and impact on public finances. This effect is illustrated on a model of state subsidizing of each one Euro spent through the state bonuses for contractual savings scheme and its impact for the national economy with offsetting the significant role of the multiplier effect.展开更多
We discuss a transfer line consisting of a reliable machine, an unreliable machine and a storage buffer. This transfer line can be described by a group of partial differential equations with integral boundary conditio...We discuss a transfer line consisting of a reliable machine, an unreliable machine and a storage buffer. This transfer line can be described by a group of partial differential equations with integral boundary conditions. First we show that the operator corresponding to these equations generates a positive contraction C0-semigroup T(t), and prove that T(t) is a quasi-compact operator. Next we verify that 0 is an eigenvalue of this operator and its adjoint operator with geometric multiplicity one. Last, by using the above results we obtain that the time-dependent solution of these equations converges strongly to their steady-state solution.展开更多
In key escrow field it is important to solve the problem thatuser's secret key completely depends on the trusted escrow agency. In 1995, some methods of solving the problem were presented. But these methods are no...In key escrow field it is important to solve the problem thatuser's secret key completely depends on the trusted escrow agency. In 1995, some methods of solving the problem were presented. But these methods are no better than that of directly using threshold cryptography. In this paper, we present a common pattern of threshold key escrow scheme based on public key cryptosystem, and a detailed design based on the improved RSA algorithm is given. The above problem is solved by this scheme.展开更多
The unilateral disposition of stock rights' voting rights detracts from the welfare of the other shareholders. Contractual arrangements restricting or prohibiting the transfer of stock rights under the capital majori...The unilateral disposition of stock rights' voting rights detracts from the welfare of the other shareholders. Contractual arrangements restricting or prohibiting the transfer of stock rights under the capital majority rule may infringe upon shareholders' fight of withdrawal, further weakening stock market constraints on senior management and indirectly raising the agency cost of management abuse of power for private ends. In creating a legal structure for stock rights transfer, we need to find an appropriate balance between freedom of contract, capital majority rule and reduction of agency costs. Judges should determine that the transfer of voting rights is invalid in order to ensure that voting rights match residual claim rights and maintain the constraints on senior management represented by shareholder voting rights. The general prohibition of stock fights transfer in the articles of association blocks shareholders' right of withdrawal; this is not conducive to restraining potential abuses of power on the part of senior management and should be made invalid. Judges must differentiate between long- and short-term contracts and the initial and revised clauses of the articles of association in order to distinguish between the efficacy of different arrangements limiting transfer of stock rights as laid down in the articles of association.展开更多
The present research aimed to improve the dissolution rate and bioavailability of curcumin using the potential of liquisolid technology. Twelve drug-loaded liquisolid systems (LS-1 to LS-12) were prepared using differ...The present research aimed to improve the dissolution rate and bioavailability of curcumin using the potential of liquisolid technology. Twelve drug-loaded liquisolid systems (LS-1 to LS-12) were prepared using different vehicles (PEG 200, PEG 400 and Tween 80) and curcumin concentrations in vehicle (40%, 50%, 60% and 70%, w/w). The carrier [microcrystalline cellulose (MCC) PH102] to coat (Aerosil<sup>®</sup>) ratio was 20 in all formulations. The systems were screened for pre-compression properties before being compressed to liquisolid tablets (LT-1 to LT-12). Post compression tests and in vitro dissolution of LTs were conducted and the results compared with those obtained for a directly compressed tablet (DCT) made of curcumin, MCC PH102 and Aerosil<sup>®</sup>. LTs exhibited higher cumulative drug release (CDR) than the DCT and the optimum formulation, LT-9 (made using Tween 80), was studied by powder XRD, DSC, SEM and FTIR. Ex-vivo permeation of curcumin from LT-9 through goat gastrointestinal mucosa was significantly (P<0.05) enhanced and its oral bioavailability was increased 18.6-fold in New Zealand rabbits. In vitro cytotoxicity (IC<sub>50</sub>) of LT-9 towards NCL 87 cancer cells was 40.2 µmol/L substantiating its anticancer efficacy. Accelerated stability studies revealed insignificant effects of temperature and humidity on LT-9. In summary, solubility enhancement of curcumin in LTs produced significant improvements in its permeation and bioavailability.展开更多
This paper describes the characteristics of a single-base repairable inventory system and multi-indenture structure with communality and redundancy. At the base, there are a working field that has a maximum of z equip...This paper describes the characteristics of a single-base repairable inventory system and multi-indenture structure with communality and redundancy. At the base, there are a working field that has a maximum of z equipment on line and its repair channels, which mainly consist of two centers: line replaceable units (LRUs) diagnostic center and shop replaceable units (SRUs) repair center. In these two centers, the resources are finite and different. We introduce routing probabilities to express the repair relationships between resources and failed replaced units. The diagnostic time follows exponential distribution and SRU repair time follows general distribution with known average. We analyze the general model of this system, and present an approximate solution that uses two-step negative binomial approximation to obtain the expected backorders of all LRUs. The first step is fitting negative binomial distributions to the distributions of the number for all SitUs at the repair center, and the second is fitting negative binomial distributions to the convolutions of the distributions of the number for all LRUs in diagnostic and assemblydelayed. Thus, we give the approximate value of operational awilability of equipment based on this method. Finally, the results under two policies of routing probabilities are compared by the optimal curves.展开更多
基金Supported by the Scientific Research Foundation for Young Faulty of Nanjing University of Aeronautics & Astronautics(S0670-082)~~
文摘As for the supply chain consisting of a manufacturer and multiple competing retailers, the disruption management decision is considered for the demand disruption that both the investment sensitivity coefficient and the investment-elasticity are changed simultaneously. Meanwhile, the corresponding solutions are given for different cases of the disruption, and the characteristics of the solutions are analyzed. The production plan is proved to he robustness under certain conditions, and the production plan of the coordination strategy is investigated for the disruption with appropriate contractual arrangement, i. e. , a subside rate schedule. Mutual restraints exist between the changed investment sensitivity coefficient and the investment-elasticity when the coordination mecha- nism is used. And the more the number of the retailers in the system, the more the subside provided by the suppler on the coordinaton strategy.
基金Supported by the Key Interdisciplinary Studies on "Resources,Environment and Recycling Economy" of Beijing,China (033000541212002)~~
文摘A thorough investigation was carried out to the pond resources of a county, and Grossman-Hart-Moore (GHM) incomplete contract theory was used to do the economic analysis on the idle pond resources. The result indicated that with the deepening of market-oriented economy, the human asset specificity under the incomplete contract had distorted the investment incentives to the governance of ponds that corresponding policies were required to govern the idle ponds.
文摘The challenge for supply chain management is to create appropriate supply chain contracts so as to optimize the system performance. To examine the role of asymmetric information in a two-echelon supply chain system and derive supply chain contracts to deal with existing asymmetric information, a two level supply chain model including one Supplier and one retailer under the demand of price elasticity is developed. By using the principalagent principle and the optimal control theory, three types of supply chain contract, i. e. , a wholesale pricing contract, a two-parameter linear and a two-parameter nonlinear contracts are obtained. In these contracts, the Supplier has asymmetric information about the retailer cost structure. Simulation results show that the two-parameter contracts are more effective strategies to achieve supply chain coordination.
基金Supported by Humanities and Social Sciences of Ministry of Education(12YJC630050)Soft Science Bidding Project of Ministry of Agriculture(20140203)+1 种基金Jiangxi Soft Science Fund(20141BBA10065)Jiangxi’s Jiangxi Provincial Education Department(GJJ13727)~~
文摘The double moral hazard of "company + farmer" and the time preference cost of company and farmer was analyzed. According to static game model, it re-vealed that the reason for low compliance rate of "company + farmer" model was the existence of market risk, namely, the fluctuation of market price, and the stable market price in contracts was actualy a kind of interval, instead of a specific value. Furthermore, the effect of default penalty, market transaction cost and time prefer-ence cost on the stability of contract was studied. The results showed that default penalty, market transaction cost and time preference cost had positive influence on the price interval range of a contract.
基金The National Natural Science Foundation of China(No.71531004)
文摘In order to curb the manufacturer’s product carbon emission levels, the leading retailer usually offers three contracts to the manufacturer, i.e., wholesale-price contract(WC), cost-sharing contract(CC) and revenue-sharing contract(RC). The results of implementing the three contracts are discussed and compared. The results reveal that as long as the government levies carbon taxations, all the three contracts can effectively stimulate the manufacturer to invest in carbon emission reduction. Among the three contracts, RC can achieve the highest level of carbon emission reduction of products and the maximum profits for both the manufacturer and retailer in a supply chain. However, the RC fails to reach the level of the centralized supply chain(CSC), thus it cannot coordinate the supply chain. The supply chain members’ contract choices are consistent. Both members prefer RC to the other two contracts. In order to effectively reduce the manufacturer’s carbon emission levels, the government should impose the highest carbon taxation level under RC, the medium carbon taxation level under CC, the lowest carbon taxation level under WC, and the same carbon taxation level as RC under the CSC.
文摘By inserting the variable of the exactness of corporate valuation into the classic model of Contract Theory, this paper, on the bases of the interaction of the variables of the veraciousness of corporate valuation, managerial incentives and operational risks, explores the deep-seated reasons for changes in corporate structures, and draws the conclusion that the divestment of the subsidiary is beneficial to shareholders when the parent corporate is undervalued and that the relation between the parent and the subsidiary is disordered, or vice versa. This conclusion is consistent with the motives of many divestiture cases in reality.
文摘A vector autoregressive model was developed for a sample of container carrier time charter rates. Although the series of time charter rates are themselves found non-stationary, thus precluding the use of many modeling methodologies, evidence provided by co-integration tests points to the existence of stable long-term relationships between the series. An assessment of the forecasts derived from the model suggests that the spec-ification of these long-term relationships does not improve the accuracy of long-term forecasts. These results are interpreted as a corroboration of the efficient market hypothesis.
基金The National Key Technology R&D Program of China during the 11th Five-Year Plan Period(No.2006BAH02A06)CSC(China Scholarship Council)Scholarship Program for Graduate Student Studying Abroad 2007
文摘In the global supply chain in a setting characterized by exchange rate uncertainties,it is quite necessary to focus on comparative research trying to find out which kind of purchasing strategy is better in different situations.The two common global purchasing strategies,risk sharing(RS)and quantity flexibility(QF),are selected to be compared.Using a real-options approach,the valuation models of RS and QF purchasing contracts are established.By means of binomial lattice technique,numerical simulation and sensitivity analysis of two stochastic dynamic programs are presented.The effects on expected discounted value by changing relative parameters are described clearly.Based on comparative analysis,it is concluded that the QF purchasing strategy is better than that of the RS especially where great volatility exists for exchange rate processes in the global supply chain.
文摘Abstract: Contractual savings scheme is specific purpose saving, which was provided in Slovakia since 1993. It is a state-supported saving, the purpose of which is to finance housing needs in the Slovak Republic. Savers can be an individual, association of owners or legal person who enters into a contract with building society or for whom the contract about contractual savings scheme is concluded. State bonuses is contractual savings scheme, a significantly more attractive form of targeted saving. This ensures the supply of investment in the construction sector, which in turn through multiplier effect significantly affects other sectors of the national economy. In this article, the authors deal with the influence of contractual savings scheme to the national economy of the Slovak Republic. The main objective of this study is describing the effectiveness of state bonuses for contractual savings scheme. It is simulated through the impact of contractual savings scheme on employment, on public funds and impact on public finances. This effect is illustrated on a model of state subsidizing of each one Euro spent through the state bonuses for contractual savings scheme and its impact for the national economy with offsetting the significant role of the multiplier effect.
基金This research is supported by Excellent Youth Reward Foundation of the Higher Education Institution of Xinjiang (No: XJEDU2004E05) the Major Project of the Ministry of Education of China(No. 205180).
文摘We discuss a transfer line consisting of a reliable machine, an unreliable machine and a storage buffer. This transfer line can be described by a group of partial differential equations with integral boundary conditions. First we show that the operator corresponding to these equations generates a positive contraction C0-semigroup T(t), and prove that T(t) is a quasi-compact operator. Next we verify that 0 is an eigenvalue of this operator and its adjoint operator with geometric multiplicity one. Last, by using the above results we obtain that the time-dependent solution of these equations converges strongly to their steady-state solution.
基金This work was supported by the National Natural Science Foundation of China (Grant Nos. 69772037, 60072018).
文摘In key escrow field it is important to solve the problem thatuser's secret key completely depends on the trusted escrow agency. In 1995, some methods of solving the problem were presented. But these methods are no better than that of directly using threshold cryptography. In this paper, we present a common pattern of threshold key escrow scheme based on public key cryptosystem, and a detailed design based on the improved RSA algorithm is given. The above problem is solved by this scheme.
基金an initial product(in Economic Law)of the Discipline Construction(Legal Science)Program in Shanghai universities
文摘The unilateral disposition of stock rights' voting rights detracts from the welfare of the other shareholders. Contractual arrangements restricting or prohibiting the transfer of stock rights under the capital majority rule may infringe upon shareholders' fight of withdrawal, further weakening stock market constraints on senior management and indirectly raising the agency cost of management abuse of power for private ends. In creating a legal structure for stock rights transfer, we need to find an appropriate balance between freedom of contract, capital majority rule and reduction of agency costs. Judges should determine that the transfer of voting rights is invalid in order to ensure that voting rights match residual claim rights and maintain the constraints on senior management represented by shareholder voting rights. The general prohibition of stock fights transfer in the articles of association blocks shareholders' right of withdrawal; this is not conducive to restraining potential abuses of power on the part of senior management and should be made invalid. Judges must differentiate between long- and short-term contracts and the initial and revised clauses of the articles of association in order to distinguish between the efficacy of different arrangements limiting transfer of stock rights as laid down in the articles of association.
文摘The present research aimed to improve the dissolution rate and bioavailability of curcumin using the potential of liquisolid technology. Twelve drug-loaded liquisolid systems (LS-1 to LS-12) were prepared using different vehicles (PEG 200, PEG 400 and Tween 80) and curcumin concentrations in vehicle (40%, 50%, 60% and 70%, w/w). The carrier [microcrystalline cellulose (MCC) PH102] to coat (Aerosil<sup>®</sup>) ratio was 20 in all formulations. The systems were screened for pre-compression properties before being compressed to liquisolid tablets (LT-1 to LT-12). Post compression tests and in vitro dissolution of LTs were conducted and the results compared with those obtained for a directly compressed tablet (DCT) made of curcumin, MCC PH102 and Aerosil<sup>®</sup>. LTs exhibited higher cumulative drug release (CDR) than the DCT and the optimum formulation, LT-9 (made using Tween 80), was studied by powder XRD, DSC, SEM and FTIR. Ex-vivo permeation of curcumin from LT-9 through goat gastrointestinal mucosa was significantly (P<0.05) enhanced and its oral bioavailability was increased 18.6-fold in New Zealand rabbits. In vitro cytotoxicity (IC<sub>50</sub>) of LT-9 towards NCL 87 cancer cells was 40.2 µmol/L substantiating its anticancer efficacy. Accelerated stability studies revealed insignificant effects of temperature and humidity on LT-9. In summary, solubility enhancement of curcumin in LTs produced significant improvements in its permeation and bioavailability.
文摘This paper describes the characteristics of a single-base repairable inventory system and multi-indenture structure with communality and redundancy. At the base, there are a working field that has a maximum of z equipment on line and its repair channels, which mainly consist of two centers: line replaceable units (LRUs) diagnostic center and shop replaceable units (SRUs) repair center. In these two centers, the resources are finite and different. We introduce routing probabilities to express the repair relationships between resources and failed replaced units. The diagnostic time follows exponential distribution and SRU repair time follows general distribution with known average. We analyze the general model of this system, and present an approximate solution that uses two-step negative binomial approximation to obtain the expected backorders of all LRUs. The first step is fitting negative binomial distributions to the distributions of the number for all SitUs at the repair center, and the second is fitting negative binomial distributions to the convolutions of the distributions of the number for all LRUs in diagnostic and assemblydelayed. Thus, we give the approximate value of operational awilability of equipment based on this method. Finally, the results under two policies of routing probabilities are compared by the optimal curves.