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A gap in the literature that remains largely unfilled is a discussion of how polycentrism relates to broader tensions between strategies of specialised industrial agglomeration economies and diverse regional portfolios. Relatively little is known about how strategies of polycentrism relate to the industrial composition and economic complementarity both at the regional scale and for individual cities within the region. In this paper, correspondence analysis is used to quantify complementarity in the economic profiles of cities in three polycentric regions. The findings suggest that the degree of complementarity varies greatly but has decreased in all three of the case study regions over time. Subsequent analysis of institutional structures in these three regions suggests that regions with weaker regional governments, stronger regional identities and intentional polycentric development strategies might experience higher levels of complementarity. A series of hypotheses that relate institutions to complementarity are proposed as possible directions for future research. [ABSTRACT FROM AUTHOR]

Abstract: Background: This paper explores user perceptions and practices in contrasting legal-policy milieux—Amsterdam (de facto decriminalization) and San Francisco (de jure criminalization) on four policy issues: sources of cannabis and separation of markets for it and other drugs; user perceptions of effects of price on consumption; effects of potency on consumption; and perceived risk of arrest and accessibility of cannabis. Methods: Questions on these issues were added to surveys on career use patterns amongst representative samples of experienced cannabis users using comparable methods. Results: Most San Francisco respondents obtained cannabis through friends who knew dealers, whereas most Amsterdam respondents obtained it from regulated shops. Only one in seven Amsterdam respondents but half the San Francisco respondents could obtain other drugs from their cannabis sources. Majorities under both systems had never found cannabis “too expensive.” Amsterdam respondents preferred milder cannabis whilst San Francisco respondents preferred stronger; majorities in both cities reported self-titrating with potent cannabis. Risk and fear of arrest were higher in San Francisco, but most in both cities perceived arrest as unlikely. Estimated search times were somewhat longer in San Francisco, but a majority reported being able to access it within half a day. Conclusions: There is substantial separation of markets in the Dutch system. Policies designed to increase cannabis prices appear unlikely to impact consumption. Decriminalization was associated with a preference for milder cannabis, but under both policy regimes most respondents self-titrated when using more potent strains. Criminalization was associated with somewhat higher risk and fear of arrest and somewhat longer search times, but these did not appear to significantly impede access for most respondents. [Copyright &y& Elsevier]

Objectives. We tested the premise that punishment for cannabis use deters use and thereby benefits public health. Methods. We compared representative samples of experienced cannabis users in similar cities with opposing cannabis policies--Amsterdam, the Netherlands (decriminalization), and San Francisco, Calif (criminalization). We compared age at onset, regular and maximum use, frequency and quantity of use over time, intensity and duration of intoxication, career use patterns, and other drug use. Results. With the exception of higher drug use in San Francisco, we found strong similarities across both cities. We found no evidence to support claims that criminalization reduces use or that decriminalization increases use. Conclusions. Drug policies may have less impact on cannabis use than is currently thought. (Am J Public Health. 2004;94:836-842). [ABSTRACT FROM AUTHOR]