Managing transformational change: the role of human resource professionals

In the past decade human resource management issues featured prominently in debates over the competitiveness and human resource professionals were expected to ascend to positions of greater influence in corporate strategy making and implementation. Despite numerous calls for a paradigm shift towards a more ‘strategic’ focus for human resource management research, developments in both practice and research fell far short of expectations. Thus, the process of transforming human resource policy into a strategic asset for employees, individual firms or the American economy is not yet complete. The paper suggests that the ‘strategic’ human resource management models of the 1980s were too limited and reactive in character because they depended so heavily on the values, strategies and support of top executives and line managers. A model capable of achieving sustained and transformational change needs to incorporate more active roles of other stakeholders in the employment relationship, including government, employes and union representatives as well as line managers and top executives. The paper starts by reviewing the evidence on innovations in human resource management in the past decade and then outlines the implications of the change model for human resource management and industrial relations theory, policy and practice. Special emphasis is given to the role of human resource professionals as potential change agents or facilitators of the transformational process.     

Applying free random variables to random matrix analysis of financial data. Part I: The Gaussian case

We apply the concept of free random variables to doubly correlated (Gaussian) Wishart random matrix models, appearing, for example, in a multivariate analysis of financial time series, and displaying both inter-asset cross-covariances and temporal auto-covariances. We give a comprehensive introduction to the rich financial reality behind such models. We explain in an elementary way the main techniques of free random variables calculus, with a view to promoting them in the quantitative finance community. We apply our findings to tackle several financially relevant problems, such as a universe of assets displaying exponentially decaying temporal covariances, or the exponentially weighted moving average, both with an arbitrary structure of cross-covariances.     

The occurrence of outliers in the explanatory variable considered in an errors-in-variables framework

Summary The problem of estimating the slope of a linear relationship between two jointly normally distributed random variables is considered when outliers may occur in the explanatory variable. It will be studied as a special case of an errors-in-variables problem where the explanatory variable is measured which a nonnormally distributed error. In this more general model and under certain conditions a consistent estimator can be given with a normal limiting distribution. Applications to cases of outliers in the explanatory variable will be presented.     

Major Matters: A Comparison of the Within‐Major Gender Pay Gap across College Majors for Early‐Career Graduates

I use data from the 1993 National Survey of College Graduates and appended 1990 Census on about 11,000 men and women college graduates (8400 with bachelor's degrees only, and 2800 with graduate degrees) who earned degrees in a 5‐year period (1984–1988), to address questions regarding the link between college major and early‐career gender pay differentials. I look at within‐major gender pay differentials for two groups of college graduates: those whose highest degrees are bachelor's and those who hold graduate degrees. Among those whose highest degrees are bachelor's, I find that within‐major gender pay penalties are virtually zero for professional majors. Gender pay penalties are large for general studies majors: social sciences, history, and humanities, and business administration (except accounting). For these, jobs account for a large portion of the unexplained gap. Among individuals who hold graduate degrees, I find that within‐major gender pay penalties are zero for all fields. My findings suggest that pay penalties to women in the aggregate can be traced to relatively large penalties in a couple of key fields (bachelor's degree–level general studies fields): social sciences and humanities, and business administration (except accounting). These findings are important, as they contradict the prevailing view. Existing empirical research suggests that women are uniformly disadvantaged compared to men regardless of field of study and, thus, field of study explains little or none of the gender gap in pay. I conclude that supply‐side mechanisms are important factors in producing gender inequality among college graduates, and suggest that we further focus our attention on the “supply side” in understanding segregation and gender pay inequality.     

THE DEADWEIGHT LOSS OF COUPON REMEDIES FOR PRICE OVERCHARGES*

Consumers injured by price overcharges often are awarded coupons that can be used for a limited period of time to purchase the good at a price below that which prevails after the overcharge has been eliminated. Coupon remedies cause a deadweight loss by inducing excessive consumption by consumers with relatively low demand during the remedy period. The magnitude of the loss can be comparable to that caused by the price overcharge. As demand variability goes to zero, the deadweight loss from coupon remedies goes to zero. Eliminating the expiration date for the use of coupons does not eliminate the loss.     

Risk aversion, liquidity, and endogenous short horizons

We analyze a competitive model in which different informationsignals get reflected in value at different points in time.If investors are sufficiently risk averse, we obtain an equilibriumin which all investors focus exclusively on the short term.In addition, we show that increasing the variance of informationlesstrading increases market depth but causes a greater proportionof investors to focus on the short-term signal, which decreasesthe informativeness of prices about the long run. Finally, wealso explore parameter spaces under which long-term informedagents wish to voluntarily disclose their information.