Competitive Pressures and Access to Infertility Treatments by Single Women

With the increase in fertility problems and delayed childbearing, demand for infertility treatments has been rising. Today, in-vitro fertilization (IVF) is the most successful infertility treatment but access to IVF is uneven due to its high costs and personal and religious attitudes. To meet rising demand for infertility treatments many markets saw an increased entry of infertility clinics. This study examines the relationship between competitive pressures and access to IVF in the United States by single women. We use US data from 1995 and 2014 to show that competitive pressures improve access to infertility treatments for single women across markets and over time. Overall, this study finds that competition among IVF clinics has a beneficial effect on access to IVF.

Relationship between population competitive intensity and yield in maize cultivars

Competition is a common phenomenon in agriculture production.Research on the relationship between competitive ability and crop yield is extensive,but the results have been inconsistent.Few studies have focused on the relationship between population competitive intensity and yield of maize（Zea mays L.）cultivars.The main objective of this study was to determine if a consistent relationship exists between maize yield and competitive ability.A two-year field experiment was conducted,employing a de Wit replacement series design.When two maize cultivars were grown in a mixture,yield was reduced for the modern cultivar and increased for the older cultivar.In each replacement series,per plant level yield of each cultivar,and population level yield of the mixture,decreased with increasing proportion of the older cultivar.Competitive ratio（CR）reflected differences in competitive ability of the three maize cultivars.In each replacement series,population competition pressure（PCP）increased with increasing proportion of the older cultivar,indicating that the older cultivar was a strong competitor.Biomass yield,grain yield,harvest index,thousand-kernel weight,and kernel number per plant,were negatively correlated with PCP.Our results demonstrated that inter-cultivar competition affects maize productivity,and increasing PCP will decrease translocation of assimilates to grain and,ultimately,reduce yield.Therefore,there is a negative correlation between population competitive intensity and yield performance in maize,breeders should develop a communal ideotype that would not perform well in competition in future.

Pressure of Competition to Listed Companies in Commodity Market and Selection of Financial Leverage

As revealed by some competition of commodities supplied foreign experts, the financial leverage has an impact on the market by different listed companies, and low financial leverage implies a competitive edge but high financial leverage is liable to fail in business operation. Viewing from such an angle, the low financial leverage is in fact a conservative financial behavior, which means a reasonable selection. Generally, Chinese listed companies prefer financing from offering equity shares, which is regarded as a reasonable selection weighing both gains and risks. However, based on an analysis of the pressure of market competition to the listed companies of various industries and how they select their own fit/ancial leverage, it is found that there is an extremely unmatched phenomenon in China＇s capital market, i.e., the keener the commodity market competition is, the higher the financial leverage of listed companies will be. Therefore, the over-financing from offering equity shares is coexisting with under-financing from offering equity shares in China＇s capital market at present, and both lead listed companies to low efficiency.