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921.
Voluntary disclosure theory predicts that an optimal disclosure decision should produce an overall net benefit for shareholders, and that such net benefit should decrease in public information availability. This study supports the predictions of voluntary disclosure theory in the context of climate change. Using voluntary disclosures made through the CSRwire news service, we find that managers’ disclosure decisions involving greenhouse gas emissions produce positive returns to shareholders. This response varies negatively with company size and public information availability. For small companies in a limited public information environment, we find that mean market-adjusted share price increases significantly by 2.32% over days −2 to 2 around the CSR newswire release date. Our sample of disclosing companies received an aggregate market value boost from their CSR news releases of approximately ten billion dollars, independent of differences in public information availability. 相似文献
922.
This paper examines whether there is a relationship between the commodity terms of trade (the price of primary commodities relative to the price of manufactures) and the net barter terms of trade of 42 Sub-Saharan African countries. For most countries, there is little evidence of a stable, long-run relationship between the two terms of trade series. Accordingly, the practice in the literature of proxying for movements in any given country's terms of trade by using an aggregate index of relative commodity prices is inappropriate, and is likely to engender misleading policy conclusions. 相似文献
923.
Drug abuse treatment has been pervasive in the US in the recent years, and the associated direct treatment costs approached $18 billion in 2001. However, there have been few published studies on scale economies, and none on scope economies, for drug abuse treatment costs. We estimate a restricted cost function for 17 hospitals in Washington State that provided inpatient and/or outpatient drug abuse treatment during the years 1997–2004. We find significant evidence of scale economies for hospitals that provide only outpatient drug abuse treatment services. The marginal costs of outpatient services are even smaller for hospitals that produce both outpatient and inpatient drug abuse treatment services. Further, these joint-production hospitals exhibit diseconomies of scope, or specialization economies. These results all imply that recent trends towards additional outpatient treatment services will enhance cost efficiency. 相似文献
924.
There is conflicting evidence concerning the impact of macroeconomic conditions on suicide rates. To help resolve this pertinent question, we present evidence using Canadian data. We estimate feasible generalized least squares models of annual gender-specific suicide rates in the working age population (aged 25–64) using data from each of the 10 Canadian provinces over the period 1982 to 2007. We allow for heteroscedasticity across provinces and first-order autocorrelation common to all provinces. We posit that suicide rates in this population are a function of macroeconomic conditions (current and lagged unemployment rates and real per capita GDP) and other determinants that might be correlated with macro conditions, such as physician supply. We find that different factors affect suicide rates across genders and that some of the results are sensitive to the specification of the model we use and the regressors included. Generally, economic conditions affect men more than women; suicide rates are counter-cyclical and a higher supply of psychiatrists in a province is correlated with lower suicide rates. 相似文献
925.
926.
The liberal arts, computer laboratory-based economics program at Denison University is described. This National Science Foundation–supported curriculum development project is one of those highlighted in the article on the economics major in this issue. 相似文献
927.
The endogeneity of the efficient frontier in the mean-variance model of portfolio selection is commonly obscured in the portfolio selection literature and in widely used textbooks. The authors demonstrate this endogeneity and discuss the impact of parameter changes on the mean-variance efficient frontier and on the beta coefficients of individual assets. 相似文献
928.
Despite overwhelming empirical evidence of the failure of factor price equalization, most teaching of international trade theory (even at the graduate level) assumes that economies are incompletely specialized and that factor price equalization holds. The behavior of trading economies in the absence of factor price equalization is not well understood, and some major textbook treatments err. The authors map regions of specialization and diversification for standard competitive economies and show how outputs, goods, and factor prices change as economies move within and across different regions of diversification and specialization. Two examples of how the analysis can enrich graduate-level trade teaching are given: the substitutability of goods trade and factor movements, and debates over the trade and inequality. 相似文献
929.
Paul Harborne Chris Hendry James Brown 《Technology Analysis & Strategic Management》2013,25(2):167-188
North American, European and Japanese governments have legislated to control Greenhouse Gas emissions and have promoted alternative technology as part of strategies to address climate change. Governments worldwide have sought to encourage adoption of alternative automotive technology by funding demonstrations and in-service trials. Among other initiatives the automotive industry has explored applications of a radical technological innovation—fuel cells—to power a range of vehicles from forklifts to buses. This paper examines the rationale and actions of various stakeholders to facilitate adoption of fuel cell technology in vehicles through a specific market segment—that of fuel cell buses (FCBs)—and explores the progress of FCB projects in North America, Europe and Japan. It examines the role of demonstration projects and highlights the complexity of the relationship between government and developers, and the multifarious and conflicting objectives of industry players that inhibit progress. 相似文献
930.
Chris Hendry Paul Harborne James Brown 《Technology Analysis & Strategic Management》2013,25(4):403-425
The paper charts the efforts to establish a successful niche position for the phosphoric acid fuel cell (PAFC) in stationary power generation, as a precursor to wider technological system and regime change. Market entry depends on matching price/performance characteristics to a niche, and improving performance through increasing returns, the most important and immediate of which are ‘learning effects’. The paper identifies five types of learning effect: (i) migrating the technology to other niches and into the mainstream; (ii) opening the way for other technologies that may have greater scope for migration; (iii) transferring learning within the pioneering company to other technologies or products; (iv) transferring experience to others in the industry; and (v) enabling users to learn. Although PAFC may be perceived as a failure in some respects, a wider perspective suggests it has made a positive and useful contribution to learning. 相似文献