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91.
Reducing adolescent substance use is important in South Africa, a developing nation with increasing adolescent substance use, lack of leisure/recreation opportunities, and high rates of adolescent discretionary time. Previous research suggests leisure boredom and adolescent substance use co-occur in this setting. Using longitudinal data from 2,580 South African adolescents as they progressed from the 8th to 11th grade, the current study disentangles the associations of trait and state leisure boredom with substance use, and examines how ability to restructure boring situations moderates those associations. On average, individuals with higher trait boredom used more substances, and on occasions when state boredom was high, the prototypical adolescent used more substances. Although restructuring did not moderate these associations, greater ability was associated with lower substance use independent of leisure boredom. Findings illustrated the importance of considering how trait and state aspects of leisure may contribute to adolescents’ risk behavior and addressed through preventive intervention.  相似文献   
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The conventional argument that the introduction of transfer of development rights (TDR) shifts the power of land use regulation from the state to the market is increasingly under challenge. In China, the state's grip on land is reinforced through TDR, in which the state is both regulator and player. This state-dominated form of TDR affects China in three ways. First, competing aspirations of different scales of government complicate how TDR is implemented. Although the central state promotes TDR to maintain a national balance of arable land, some local states instrumentalize it to expand their landed basis of accumulation. Secondly, TDR tends to benefit the state but not its people. It may increase the fiscal income of the sending government and lessen the land shortage of the receiving government, but sometimes at the expense of the interests of land users without land ownership. Thirdly, given the state's deep involvement in TDR programs, the key for China's TDR to protect arable land lies not so much in clear property rights or a fully fledged market as in effective checks and balances regarding the state's powers over TDR. These three observations attest to the embeddedness of TDR in the local political economy.  相似文献   
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The racial impact of a quantity–quality tradeoff in physician supply (implemented through medical education reform) made during an era of racial segregation is assessed. The reform produced differential impacts across race and region. The health status of northern blacks improved the most; that of southern blacks the least. Accordingly, the health status gap between northern whites and blacks diminished, but the gap between southern blacks and every other demographic group increased. The path of northern blacks suggests that access to and high quality of health care are both necessary to close the racial gap in health status that persists today.  相似文献   
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Summary We obtain bounds for the difference between the median and mean of the beta and negative binomial distributions using elementary methods.  相似文献   
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This article reviews the extensive political and economic literature since 1990 on corruption in Indonesia, Philippines, Thailand, Malaysia and Singapore. After considering each country's individual recent history of corruption, the article comparatively analyses the relationship of corruption in these countries with, respectively, the roles of the state, the private sector and external actors, democratisation and decentralisation, and the impact of corruption on economic growth and inequality. Our conclusion is that while economic liberalisation, democratisation and centralisation of state power influence the forms of corruption and its impact on national economic performance, they are neither necessary nor sufficient for its decline.  相似文献   
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