Imputation methods of missing data for estimating the population mean using simple random sampling with known correlation coefficient

This paper considers three ratio estimators of the population mean using known correlation coefficient between the study and auxiliary variables in simple random sample when some sample observations are missing. The suggested estimators are compared with the estimators of Singh and Horn (Metrika 51:267–276, 2000), Singh and Deo (Stat Pap 44:555–579, 2003) and Kadilar and Cingi (Commun Stat Theory Methods 37:2226–2236, 2008). They are compared with other imputation estimators based on the mean or a ratio. It is found that the suggested estimators are approximately unbiased for the population mean. Also, it turns out that the suggested estimators perform well when compared with the other estimators considered in this study.     

Determinants of Corporate Social Responsibility Disclosure Ratings by Spanish Listed Firms

The aim of this paper is to analyze whether a number of firm and industry characteristics, as well as media exposure, are potential determinants of corporate social responsibility (CSR) disclosure practices by Spanish listed firms. Empirical studies have shown that CSR disclosure activism varies across companies, industries, and time (Gray et al., Accounting, Auditing & Accountability Journal 8(2), 47–77, 1995; Journal of Business Finance & Accounting 28(3/4), 327–356, 2001; Hackston and Milne, Accounting, Auditing & Accountability Journal 9(1), 77–108, 1996; Cormier and Magnan, Journal of International Financial Management and Accounting 1(2), 171–195, 2003; Cormier et al., European Accounting Review 14(1), 3–39, 2005), which is usually justified by reference to several theoretical constructs, such as the legitimacy, stakeholder, and agency theories. Our findings evidence that firms with higher CSR ratings present a statistically significant larger size and a higher media exposure, and belong to more environmentally sensitive industries, as compared to firms with lower CSR ratings. However, neither profitability nor leverage seem to explain differences in CSR disclosure practices between Spanish listed firms. The most influential variable for explaining firms’ variation in CSR ratings is media exposure, followed by size and industry. Therefore, it seems that the legitimacy theory, as captured by those variables related to public or social visibility, is the most relevant theory for explaining CSR disclosure practices of Spanish listed firms.     

The value relevance of earnings disaggregation provided in the Spanish profit and loss account

This study analyses the value relevance of the different components of the earnings figure that appear in the Spanish profit and loss account in order to determine the preferred level of disaggregation by investors. It is considered that the disaggregation may help to evaluate the earnings quality; that is, its predictive ability about future earnings. We use a valuation model based on Ohlson (1995), which models firm value as a function of book value of equity and earnings, adding the earnings components to determine whether they provide incremental price-relevant information beyond aggregate earnings. In addition, we allow the parameters to vary under some firm-specific circumstances. Our results support the usefulness of the earnings decomposition for valuation purposes, resting primarily on the disclosure of the corporation tax, particularly for either small companies, or with a high-risk profile or with low persistence of earnings. It seems that neither financial profit nor extraordinary earnings have additional information content over the bottom-line figure, which is consistent with the IASC's position on ordinary versus extraordinary items.     

The New Method to Determine Ownership Stake to Exercise Control： An Empirical Analysis on Italian Companies

The idea of this work arises from the analysis of the researches developed in the literature on topic of ownership and control that are mostly based on threshold of ownership stake to determine control equal for all companies and, in most cases, not supported by theoretical arguments and empirical evidences. In fact, the aim of this paper is to build a new method of determining the threshold of ownership stake that allows the shareholder to exercise control. In particular, this survey uses all Italian listed companies as reference, and the minutes of the Ordinary and Extraordinary General Meetings of shareholders, in 2009-2012, as database. The topic can be enriched with further and future researches aiming to adapt this new method in a cross-country investigation and so to identify the different threshold for the countries, on the basis of the different national laws regarding the ownership stakes that affect the control.     

Platform competition: Strategic trade‐offs in platform markets

Because the literature on platform competition emphasizes the role of network effects, it prescribes rapidly expanding a network of platform users and complementary applications to capture entire markets. We challenge the unconditional logic of a winner‐take‐all (WTA) approach by empirically analyzing the dominant strategies used to build and position platform systems in the U.S. video game industry. We show that when platform firms pursue two popular WTA strategies concurrently and with equal intensity (growing the number and variety of applications while also securing a larger fraction of those applications with exclusivity agreements), it diminishes the benefits of each strategy to the point that it lowers platform performance. We also show that a differentiation strategy based on distinctive positioning improves a platform's performance only when a platform system is highly distinctive relative to its rivals. Our results suggest that platform competition is shaped by important strategic trade‐offs and that the WTA approach will not be universally successful. Copyright © 2013 John Wiley & Sons, Ltd.     

A SCHUMPETERIAN GROWTH MODEL WITH EQUILIBRIUM UNEMPLOYMENT

We introduce efficiency‐wage unemployment in a model of growth with endogenous technical change. Our research aim is twofold. First, we try to provide an analytically tractable model of growth with efficiency‐wage unemployment that can be viewed as alternative to the standard models of growth and search unemployment. Second, we try to analyze the steady‐state effects of some labor market policies on unemployment and growth. We find that a positive relationship between growth and unemployment exists and that the effectiveness of any labor market policy aimed at improving the performance of the labor market crucially depends on how individuals discount future income.     

Consulting University: A Reflection from Inside

This paper contributes to a growing literature on the role of management consultants in the public sector by examining a sensitive area of management consulting, as exercised by university faculty members and as applied to universities. It frames the development of management consulting as an idea that originated in universities, travelled first into the private sector and then into the public sector, from country to country, and was eventually applied to universities – with problematic effects.     

Capital structure,executive compensation,and investment efficiency

This paper examines how the similarity between the executive compensation leverage ratio and the firm leverage ratio affects the quality of the firm’s investment decisions. A larger leverage gap (i.e., a bigger difference between these two ratios) leads to more investment distortions. Managers with more debt-like compensation components tend to under-invest, whereas managers with larger equity-based compensation engage more in over-investment. Furthermore, investment distortion is likely to increase the equity (debt) value when compensation leverage is lower (higher) than firm leverage. These findings suggest that managers can deviate from an optimal investment policy to increase the value of their portfolio, and that a lower leverage gap can reduce agency costs.