The impact of product diversification strategy on the corporate performance of large Spanish firms

We analyze the impact of product diversification on performance. This topic has been discussed in the literature, and there is no consensus so far as to the significance or the direction of the impact. Performance is measured using Tobin's q for a sample of 103 large, non-financial Spanish firms (1992–1995). Diversification is measured by means of a categorical variable, as suggested by Varadarajan. The principal results indicate that the firms with intermediate levels of product diversification have the highest performance, while the firms with low and high levels of diversification show significantly lower performance, which performance is not significantly different between them.     

Mill’s radical end of laissez-faire: A review essay of the political economy of progress: John Stuart Mill and modern radicalism

Can John Stuart Mill’s radicalism achieve liberal egalitarian ends? Joseph Persky’s The Political Economy of Progress is a provocative and compelling discussion of Mill’s economic thought. It is also a defense of radical political economy. Providing valuable historical context, Persky traces Mill’s intellectual journey as an outspoken proponent of laissez-faire to a cautious supporter of co-operative socialism. I propose two problems with Persky’s optimistic take on radical social reform. First, demands for substantive equality have led past radicals to endorse exclusionary nationalist and eugenics policies. It pushes some contemporary radicals towards illiberal interventions into intimate social life. Second, the radical critique of capitalism relies on an account of profit that neglects the epistemic function of private-property markets. Once this is acknowledged, capitalism retains some progressive credentials against radical alternatives.     

长江三角洲地区跨国公司营运趋势与对策研究

该文以长江三角洲地区跨国公司为研究对象,分析了近年来这一地区跨国公司投资总量、投资来源、投资产业、投资方式等营运变化趋势,在此基础上提出长江三角洲地区进一步吸引跨国公司投资的对策。     

Economic reforms,efficiency and productivity in Chinese banking

This paper analyzes the impact of banking reforms on efficiency and total factor productivity (TFP) change in Chinese banking industry. Using an input distance function, we find that joint-equity banks are more efficient than wholly state-owned banks (WSOBs). Furthermore, both WSOBs and joint-equity banks are found to be operating slightly below their optimal size, suggesting potential advantages in expansion of their businesses. Overall, TFP growth was 4.4% per annum for the sample period 1993–2002. Joint-equity banks experienced much higher growth in TFP (5.5% per annum) compared to the WSOBs (1.4% per annum).      

Integrated bio-economic models as tools to support land-use decision making: a review of potential and limitations

Bio-economic modelling has become a useful tool for anticipating the outcomes of policies and technologies before their implementation. Advances in mathematical programming have made it possible to build more comprehensive models. In an overview of recent studies about bio-economic models applied to land-use problems in agriculture and forestry, we evaluated how aspects such as uncertainty, multiple objective functions, system dynamics and time have been incorporated into models. We found that single objective models were more frequently applied at the farm level, while multiple objective modelling has been applied to meet concerns at the landscape level. Among the objectives, social aspects are seldom represented in all models, when being compared to economic and environmental aspects. The integration of uncertainty is occasionally a topic, while stochastic approaches are more frequently applied than non-stochastic robust methods. Most multiple-objective models do not integrate uncertainty or sequential decision making. Static approaches continue to be more recurrent than truly dynamic models. Even though integrating multiple aspects may enhance our understanding of a system; it involves a tradeoff between complexity and robustness of the results obtained. Land-use models have to address this balance between complexity and robustness in order to evolve towards robust multiple-objective spatial optimization as a prerequisite to achieve sustainability goals.     

The Practice Boundaries of Advanced Practice Nurses: An Economic and Legal Analysis

The purpose of this study is to examine the effects of State regulation that determines the extent of professional independence of advanced practice nurses (APNs). We find that in States where APNs have acquired a substantial amount of professional independence, the earnings of APNs are substantially lower, and those of physicians assistants (PAs) are substantially higher, than in other States. These results are striking since PAs are in direct competition with APNs; the only real operational difference between these groups is that PAs are salaried employees who must work under the supervision of a physician. The implication is that physicians have responded to an increase in professional independence of APNs by hiring fewer APNs and more PAs. The finding that earnings of APNs decline when they attain more professional autonomy vis-à-vis physicians reinforces work by Sass and Nichols on physical therapists.The content is the responsibility of the authors and does not represent official positions of the Federal Reserve Bank of St. Louis or the Federal Reserve SystemJEL classification: I11, I18, J31, J44, L51     

R~2、异常收益与交易的信息成分

在CAPM回归中,低R^2的公司的价格是否更有效地反映了公司的特质信息在学术界始终存在争论。在R^2与公司特征变量的横截面检验基础之上,我们通过一个零成本投资组合考察了两个竞争性的理论。结果发现,（1）R^2与公司信息环境有显著关系,而且对于市场信息反应不够有效的公司,R^2会更低;（2）低酽股票组合短期的异常收益有更明显的时间序列可预测性和横截面风险,这说明在我国股市,低群代表了资产价格中更大的噪音成分;（3）股票的R^2与其价格中所包含的信息不对称或逆向选择成分呈负相关。