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Newly available geographical information from the Panel Study of Income Dynamics (PSID) is used to estimate a variety of relationships involving high-poverty metropolitan census tracts. The longitudinal data from the PSID show a great deal of geographical mobility even for persistently poor adults, with as many as one fourth of certain groups of these entering and leaving poor urban census tracts in a year. At the same time, solution of the transition matrices for various groups—whites and blacks of various income classes, in families with and without children, living in different types of census tracts—in the early 1980s shows the gradual emptying out of poor urban tracts, particularly of whites and blacks in families without children. As a consequence, despite the great degree of geographical “churning,” poor urban areas gradually become poorer, blacker, and the home of a larger share of black families with children. Some of these aggregate trends had been noticed by researchers comparing these areas in the 1970 and 1980 censuses; our more up-to-date results demonstrate the relationships between the micro and macro data.  相似文献   
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Climate change is an increasingly complex and global environmental issue. As a result, scholars have begun to compare the efforts of specific countries such as the UK and the USA in dealing with climate change. However, missing within this comparative literature is a discussion of the important role that administrative agencies play in implementing climate change policy through rulemaking. More specifically, it is unclear how administrative processes may impact or explain variations in the policy implemented within a given country. In fact, it has been over 25 years since Vogel's work compared the regulatory processes of the USA and UK. As a result, this paper's interviews with agency rule writers in both countries provide an updated comparison of their rulemaking processes, which is essential to understanding why countries may vary in the climate change policy they implement. Copyright © 2014 John Wiley & Sons, Ltd.  相似文献   
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As parties bargain over the terms of an agreement, they are concurrently negotiating their relationship. In this parallel negotiation, parties seek to position themselves to advantage by using a variety of strategic moves. In so doing the other party can be put into a defensive position making it difficult to advocate effectively. Turns, such as interrupting, correcting, questioning, naming, and diverting, challenge these moves. Turns can be used restoratively to move out of a defensive position or participatively, to engage the other in collaboration. Anticipating strategic moves and having turns in mind is part of preparing to negotiate.  相似文献   
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