Do stable strategic time periods exist? Towards new methodological and theoretical insights

This paper investigates a fundamental issue in the current research on strategic groups: the existence or non‐existence of the so‐called ‘stable strategic time periods’ (SSTPs). Our study provides new evidence by adding new methodological and theoretical insights. The research setting is the Spanish banking industry over a 15‐year period, 1983–1997. Unlike all prior longitudinal research that found SSTPs, the multi‐method procedure that we used in this study (i.e. equality of variance and covariance matrix and mean vector of strategic variables and a subsequent grouping analysis performed through the MCLUST) has led us to reject the existence of SSTPs in the industry under study. Based on these original findings, we conclude by suggesting a proposition which should be corroborated in future empirical studies on strategic groups. Copyright © 2007 John Wiley & Sons, Ltd.     

The role of information technology in corporate strategy of small and medium enterprises

The crisis of the new economy might have cast doubt on the usefulness of the Internet for business activities. However, it is unquestionable that the possibilities offered by Internet-based technologies in terms of information processing, transfer and collection enable the firm to improve market knowledge and the relationship with clients and suppliers. This work explores, theoretically and empirically, the possibilities offered by the Internet to facilitate the internationalization process of Small and Medium Enterprises (SMEs) as well as to improve the relationship with other firms within the same value chain. Using a wide representative sample of Spanish SMEs, the empirical analysis confirms the benefits of the Internet in both cases.     

Effects of database choice on international accounting research

Data availability is one of the traditional obstacles confronting researchers carrying out international empirical studies in accounting. In recent years several databases have claimed to offer comprehensive coverage of accounting and financial data of firms worldwide. We analyse whether the choice of database has an effect on the results of empirical studies. We find that the results of a simple empirical adaptation of the Ohlson (1995 ) model for fourteen member states of the European Union change significantly depending on the database chosen (Datastream, Global Vantage, Company Analysis, Worldscope, Thomson Financial, Financials and BvD Osiris). These differences are mainly attributable to differences in the samples across databases. When we match observations across all databases the differences persist but are much less pronounced. Our main conclusion is that database choice matters, as it leads to different results when the same research design is used.     

A Fuzzy clustering approach to the key sectors of the Spanish economy

The search for key sectors in an economy has been and still is one of the more recurrent themes in input–output analysis. When using clustering techniques, sectors can only belong to a group, having a particular performance. But, actually, the same sector could be important from different perspectives at the same time, to a different degree. So, a fuzzy clustering approach is needed. In this work we propose a multidimensional approach to classify the productive sectors of the Spanish input–output table for 1995, based on three groups of variables: those related to their productive integration, others measuring their specific weight in the economy and finally some showing their economic dynamic. We also incorporate into the analysis the technological level, which being a categorical variable presents special methodological problems. All these questions are tackled applying a robust and fuzzy clustering analysis, which gives as a result a classification of sectors illustrating the role that each one plays in the Spanish economy.     

谈谈消费经济学的走向--为纪念《消费经济》创刊20周年而作

二十年来，在《消费经济》的倡导和支持下，消费经济从无到有，而今已茁壮成长，成为经济学的一个重要分支，令众多学子敬仰。     

Homogeneity tests in meta-analysis: a Monte Carlo comparison of statistical power and Type I error

The statistical power and Type I error rate of several homogeneity tests, usually applied in meta-analysis, are compared using Monte Carlo simulation: (1) The chi-square test applied to standardized mean differences, correlation coefficients, and Fisher's r-to-Z transformations, and (2) S&H-75 (and 90 percent) procedure applied to standardized mean differences and correlation coefficients. Chi-square tests adjusted correctly Type I error rates to the nominal significance level while the S&H procedures showed higher rates; consequently, the S&H procedures presented greater statistical power. In all conditions, the statistical power was very low, particularly when the sample had few studies, small sample sizes, and presented short differences between the parametric effect sizes. Finally, the criteria for selecting homogeneity tests are discussed.     

The nature and role of agricultural cooperative societies in Czechoslovakia

This paper considers the evolution of agricultural cooperative societies, the horizontal and vertical cooperation and the principles of self-financing and cooperative democracy. The relationships between ACS and the State are discussed, particularly in terms of price determination. The productivity results of ACS in Czechoslovakia are evaluated. The role of ACS in scientific technical development is discussed with consideration of the interaction between agricultural enterprises, scientific institutions and industry. Finally, the contribution of ACS to the socioeconomic and cultural transformation of rural areas is evaluated.