A ten-sector, sequential applied general equilibrium model is formulated, estimated, and stimulated for analyzing agricultural policy choices for India until year 2000. Ten groups of consumers (five of them rural), each with its own preferences and claims on output are recognized in the model, the groups distinguished by the range of their per capita household (real) consumption expenditure. The simulations compare: four policies with respect to the compulsory purchase and subsidized distribution to consumers of a limited amount of foodgrains and four foreign trade and aid scenarios. Procuring and freely distributing 100 kgs of grain per capita per year and financing the cost through additional taxation improves income distribution with no reduction in growth. On the other hand, the same distributional policy financed by reducing investment has a negative impact on growth. 相似文献
This paper is a tutorial exposition on the generalized inverse of a matrix with typical applications to regression analysis and mathematical programming. The exposition contains examples exhibiting geometrical motivation and related facts useful in application of the generalized inverse. Some proofs are given to indicate a few of the theoretical aspects of the generalized inverse. 相似文献
ABSTRACTIn this article, life history methodology and principles of counterstorytelling are used to examine moments when one Black male preservice social studies teacher and three Black male social studies teachers challenge Black masculinist visions of leadership, and moments when they seem complicit in perpetuating these visions. Findings indicate that these educators’ understandings of Blackness, maleness, and the pursuit of Black masculine recognition are fluid, developing and sometimes contradictory. We argue that while necessary across disciplines, interrogations of Black masculinity are uniquely imperative in social studies teacher education due to how assumptions about Blackness and maleness have shaped struggles for Black civic recognition. 相似文献
Job strain has been associated with hypertension among younger workers; however, whether this relationship persists among
older workers, particularly older racial/ethnic minorities, is unresolved. This study evaluated whether job strain and workplace
discrimination are associated with hypertension and poor blood pressure control among older workers and whether these relationships
vary by gender and race/ethnicity. Data were drawn from the Health and Retirement Study, and analysis was restricted to employed
participants with complete information on job strain and blood pressure (N = 3,794). In adjusted models, high job strain was associated with lower likelihood of hypertension (odds ratio (OR): 0.75,
95% confidence interval (CI): 0.63, 0.89) relative to low job strain. Stratified analyses indicated this association was only
significant among white (OR: 0.71, 95% CI: 0.58, 0.86) and male (OR: 0.61, 95% CI: 0.47, 0.79) workers. High job strain was
not significantly associated with hypertension among African American (OR: 1.14, 95% CI: 0.63, 2.07) or Hispanic (OR: 0.56,
95% CI: 0.29, 1.09) workers. Workplace discrimination was not associated with hypertension among any group. Neither job strain
nor discrimination was associated with poor blood pressure control. These findings suggest that persistence in work characterized
by high job strain in later life may signal resilience to the influence of work-related stressors on health. Future research
efforts should examine the factors that contribute to gender and racial differences in these relationships. 相似文献
Objective: Although two-thirds of graduating high school seniors attend college or university in the U.S., there is a paucity of national or state specific research regarding SRH services available on or near college and university campuses.
Methods: A review of websites for all colleges and universities in Georgia was conducted to evaluate sexual health services available on campuses and evidence of referral to community providers.
Results: Of 96 colleges in Georgia, 44 had campus-located health centers, with only 3 at two-year colleges. Overall SRH service provision was low, with great variation between colleges. Distances between colleges and Title X clinics ranged from 0.33 to 35.45 miles.
Conclusions: Many students lack access to campus health centers, and information on college websites regarding SRH service availability and referrals differs dramatically between campuses. In the absence of robust campus-located services, schools should highlight where students can obtain comprehensive SRH care in the community. 相似文献
People's views on planning differ widely, as this article demonstrates. Within the broad field of planning, strategic policy-making is becoming ever more important. The authors aim to discuss a number of well known concepts, methods and theoretical approaches as they appear in the business and management literature of planning. In Part 1 they indicate the variety of planning attitudes and discuss why planning is necessary and what it entails. In Part 2, with the aid of conceptual frameworks, they discuss various planning approaches and new developments and end with an examination of rational planning and strategic policy making. 相似文献
Dose‐response models in microbial risk assessment consider two steps in the process ultimately leading to illness: from exposure to (asymptomatic) infection, and from infection to (symptomatic) illness. Most data and theoretical approaches are available for the exposure‐infection step; the infection‐illness step has received less attention. Furthermore, current microbial risk assessment models do not account for acquired immunity. These limitations may lead to biased risk estimates. We consider effects of both dose dependency of the conditional probability of illness given infection, and acquired immunity to risk estimates, and demonstrate their effects in a case study on exposure to Campylobacter jejuni. To account for acquired immunity in risk estimates, an inflation factor is proposed. The inflation factor depends on the relative rates of loss of protection over exposure. The conditional probability of illness given infection is based on a previously published model, accounting for the within‐host dynamics of illness. We find that at low (average) doses, the infection‐illness model has the greatest impact on risk estimates, whereas at higher (average) doses and/or increased exposure frequencies, the acquired immunity model has the greatest impact. The proposed models are strongly nonlinear, and reducing exposure is not expected to lead to a proportional decrease in risk and, under certain conditions, may even lead to an increase in risk. The impact of different dose‐response models on risk estimates is particularly pronounced when introducing heterogeneity in the population exposure distribution. 相似文献