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This paper critically reviews the existing literature on multiple-trip journeys, and clarifies the need for an improved conceptualization and modeling strategy. It also suggests different ways that trip chaining can be treated and a theory constructed. Exploratory studies, from the 1960s and 1970s, are briefly surveyed (Section I). While they developed the existence and complexity of travel patterns, they lacked any comprehensive theoretical framework. However, they were useful in that they supported the conceptual framework of various kinds of stochastic processes used by transportation scientists to replicate trip-chaining behavior (Section II). Scientists subsequently improved their conceptualization of the issue by grounding individual behavior on the principle of utility maximization. In this latter area the economists have emphasized theoretical concerns while transportation researchers have emphasized operationality (Section III).  相似文献   
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This article examines a group of photographs bearing a strong violent content that were published in print and digital media as part of the coverage of the ‘war against drugs’ in Mexico: an armed conflict initiated by the central government in December 2006. This military action was the first step in a process of militarization affecting several states, in which an attempt was made to dismantle territorial pacts between cartels, to control the illegal traffic in drugs and, supposedly, to put an end to the use and production of drugs among the population. This war gave rise to one of the bloodiest episodes of contemporary Mexico in which drug cartels reproduced and invented new methods of torture that were used not only upon the gunmen of rival cartels but also on a significant number of civilians. In the coverage of these events, not all photojournalists reacted to this upsurge in violence in a ‘sensationalist’ manner; several set out to produce images from unusual points of view. In particular, I shall analyze how certain images represent violence in a tense relationship with artistic iconography, upsetting parameters of horror and beauty in the public sphere.  相似文献   
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Randomized control trials (RCTs) have a narrow scope, restricted to basic intervention schemes. Experimental designs also display specific biases and political uses when implemented in the real world. Despite these limitations, the method has been advertised as the gold standard to evaluate development policies. This article adopts a political economy approach to explore this paradox. It argues that the success of RCTs is driven mainly by a new scientific business model based on a mix of simplicity and mathematical rigour, media and donor appeal, and academic and financial returns. This in turn meets current interests and preferences in the academic world and the donor community.  相似文献   
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The paper brings to light a literary fabrication cast as a “chinoiserie» published in Paris in 1788 and tentatively explores its implicit message. The fabrication implies the title—allusion to the pamphlet written by the radical Morelly then commonly credited to Diderot—, the author—the Chinese philosopher contemporary of Socrates—, the alleged translation—which could never have occurred—, and the commentary attributed to a Jesuit of the French mission in China. The genuine author of the fabrication, a plea for the abolishion of the death penalty and a satire on the legal institution and the Clergy, is Louis Lavicomterie who later will be a member of the Montagne and will vote the death of Louis XVI. He fathered the book during the French Revolution. The reconstitution of the historical context helps to decipher the cryptic purpose of this chinese message. Behind Confucius, Lavicomterie has introduced Voltaire. The text reflects the moral and intellectual expectations at the eve of the turmoil: the increasing search for secularization and the rejection of the fundamental divine rights of the Ancien Régime.  相似文献   
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There is growing evidence that microcredit does little to support self‐employment. Two main explanations are typically emphasized: from a microeconomic perspective, the poor have been argued to lack the skills, resources and motivation to start their own businesses; from a macroeconomic perspective, local markets are often saturated. This article uses first‐hand data from rural South India to explore a third explanation which focuses on the social regulation of markets. Drawing on a household survey, the authors show that self‐employment and microcredit are uncorrelated, and that women and lower castes have a significantly lower chance of starting up a business. The businesses they do start tend to be smaller, less profitable and based in very specific sectors. Qualitative insights into the workings of local economies show that caste and gender‐based social regulations influence local markets determining who can produce or sell what, to whom, and at what price. The authors observe that real markets are affected by power relations and structured through social institutions rather than being the sum of interactions between free and competitive individuals. These findings show the importance of integrating self‐employment programmes into broader policies for transforming the social regulation of markets and for eradicating discrimination against women and lower castes.  相似文献   
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