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Previous research has established a relationship between income and food security. In this article, we examine the effect of food security on food purchases, specifically on five food‐at‐home groups. Using a set of Tobit models, and after controlling for a set of confounding factors, we show that food security perception leads to the purchase of fruit and vegetables, meats and eggs, and dairy products while decreasing the purchase of fat and carbohydrates. However, we cannot be certain of the actual nutritional effect. 相似文献
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Angélica Durán‐Martínez 《拉美政治与社会》2015,57(3):122-146
Over the past decade, drug consumption has increased in Colombia and Mexico, countries traditionally concerned with drug production and trafficking. Governments and observers have associated this growth with spikes in violence. Drawing on drug consumption surveys and fieldwork in four cities, this study argues that contrary to this perception, there is no automatic connection between domestic drug markets and violence. Violence depends on whether large drug‐trafficking organizations (DTOs) control low‐level street dealers and on whether those DTOs have a market monopoly at the local level. When dealers are independent, violence might be sporadic, but when DTOs control dealers, violence can explode (given competition between DTOs) or implode (if one organization holds a monopoly). Control over dealers provides DTOs not only income but also informants and armed muscle. This article also shows that domestic drug markets are not new, and have grown incrementally in the past two decades. 相似文献
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Design‐Build‐Finance‐Maintain‐Operate (DBFMO) contracts are a particular type of public‐private partnership whereby governments transfer the responsibility for the design, construction, financing, maintenance, and operation of a public infrastructure or utility service building to a multi‐headed private consortium through a long‐term performance contract. These arrangements present a typical principal‐agent problem because they incorporate a “carrot and stick” approach in which the agent (consortium) has to fulfill the expectations of the principal (procurer). This article deals with a neglected aspect in the literature related to the actual use of “the sticks or sanctions” in DBFMOs and assesses to what extent and under which conditions contract managers adopt a deterrence‐based enforcement approach or switch to a persuasion‐based approach, specifically when the contract clauses require the use of (automatic) deterrence. An empirical analysis of four DBFMOs in the Netherlands shows that the continuation of service delivery, the need to build trust, and the lack of agreement on output specifications play a role in the willingness of the procurer to apply a more responsive behavior that uses persuasion, even when deterrence should be automatically applied. © 2016 John Wiley & Sons Australia, Ltd 相似文献