Period effects,cohort effects,and the narrowing gender wage gap

Despite the abundance of sociological research on the gender wage gap, questions remain. In particular, the role of cohorts is under investigated. Using data from the Current Population Survey, we use age–period–cohort analysis to uniquely estimate age, period, and cohort effects on the gender wage gap. The narrowing of the gender wage gap that occurred between 1975 and 2009 is largely due to cohort effects. Since the mid-1990s, the gender wage gap has continued to close absent of period effects. While gains in female wages contributed to declines in the gender wage gap for cohorts born before 1950, for later cohorts the narrowing of the gender wage gap is primarily a result of declines in male wages.     

Expected Absolute Error of the Usual Estimator of the Binomial Parameter

For X with binomial (n, p) distribution the usual measure of the error of X/n as an estimator of p is its standard error S_n(p) = √{E(X/n – p)²} = √{p(1 – p)/n}. A somewhat more natural measure is the average absolute error D_n(p) = E‖X/n – p‖. This article considers use of D_n(p) instead of S_n(p) in a student's first introduction to statistical estimation. Exact and asymptotic values of D_n(p), and the appearance of its graph, are described in detail. The same is done for the Poisson distribution.     

Contextualizing LMX within the workgroup: The effects of LMX and justice on relationship quality and resource sharing among peers

While leader–member exchange (LMX) has evolved, a richer understanding continues to evade scholars due to the sustained focus on the leader–member dyad. We argue that LMX theory remains incomplete until contextual factors surrounding these pivotal relationships are accounted for including the impact of coworker exchange relationships, peer exchange, and perceptions of justice regarding individual LMX relationships. A fully crossed experimental design manipulating participant LMX and distributive justice and coworker LMX and distributive justice was employed to understand how these constructs affect coworker exchange relationships. Support was found for a causal model which specifies that justice moderates the causal relationship between LMX similarity and CWX, which subsequently leads to increased sharing of resources among coworkers. The data suggest that workgroup members are savvy to differences within individual leader–member relationships, where the sharing of resources among peers is determined by their own LMX, the LMX of their coworker and perceptions of justice of their respective LMX levels. These findings are contextualized in extant leadership research and practice.     

The Distribution of Sums of I.I.D. Pareto Random Variables with Arbitrary Shape Parameter

Laplace transforms are used to derive an exact expression for the cdf of the sum of n i.i.d. Pareto random variables with common pdf f(x) = (α/β)(1 + x/β)^?α?1 for x > 0, where α > 0 and is not an integer, and β > 0. An attractive feature of this expression is that it involves an integral of non oscillating real-valued functions on the positive real line. Examples of values of cdfs are provided and are compared to those determined via simulations.     

Comparing UK and Other Western Countries' Health Expenditure,Relative Poverty and Child Mortality: Are British Children Doubly Disadvantaged?

We examined the UK's effectiveness in reducing Child Mortality with 20 other Western countries, in the context of their national health expenditures, and, relative poverty — measured by ‘Income Inequality’ the gap between top and bottom 20 per cent of income. W.H.O. Child (0–14) Mortality Rates (CMR) and GDP Expenditure on Health (% GDPHE) were examined and a cost‐effectiveness ratio calculated, which is the reduced CMR over the period divided by average GDPHE. The highest average % GDPHE was USA at 13.2 per cent; the UK's 7.3 per cent was equal lowest. The widest Income Inequality was USA 8.5 times; the UK at 7.2 was third widest. The highest CMR was the USA 2436 per million (pm), the UK's 1630 pm, although representing a fall of 62 per cent was fourth highest. However, UK cost‐effectiveness ratio (1: 350) was eighth best of 21 countries. Only Income Inequality correlated significantly with CMR. UK CMR fell significantly more than five countries but ten others declined more. If UK deaths had been at the average of the 17 countries with lower CMR, there would have been 1827 fewer deaths. British children's poverty and health expenditure means they and their services are doubly disadvantaged although the NHS relatively achieved more with comparatively less.     

Qualitative Research: Valuable or Irrelevant?

This paper evaluates qualitative research methods in relation to the emancipatory research model. It identifies the main reasons why researchers opt for qualitative research, describes the principal data collection techniques used by them, and discusses some of the problems associated with these procedures. Drawing on insights gained from doing qualitative research in day centres for disabled young adults, I argue that these methodologies are fundamental to the emancipatory research paradigm; but their relevance can only be determined by researchers' willingness to challenge the institutions which control disability research production.     

Strategic thinking with computers

The author describes the development of a system of cognitive mapping as a strategic management tool. Strategic Options Development and Analysis (SODA) has been used extensively by project teams working on strategic issues. A typical programme is described and the procedure is based on attention to the ownership of data as the basic material, and on the design of strategy workshops using the owned data. This appendix describes the use of the system in practice and the benefits and drawback perceived in running the strategy workshop.     

Managing organizational change—A strategic approach

Developing the competence, commitment and capacity for change of people is a vital element in the creation and maintenance of competitive advantage and should be an integral part of the strategic equations and business plans of any firm. This theme, examples of ‘good’ practice, and strategies to implement a strategic approach to people have been explained and developed in a brief case ‘action pack’ produce by the authors of this article for the MSC and NEDO. Key factors identified in the development of the three ‘C’s are effective leadership, involvement and good employee communications, stress on performance management, appropriate reward systems and training and development.