Quadratic fractional age assumption revisited

This paper introduces a quadratic fractional age assumption which makes the force of mortality and survival function continuous at all ages. The necessary and sufficient condition for the assumption to be valid is derived. Important life table parameters are estimated and applications are shown using several life table data.     

Trends in Alcohol Consumption Among Undergraduate Students at a Northeastern Public University, 2002–2008

Abstract

Objective: This study examined alcohol consumption patterns and trends at a public university in the Northeast from 2002 to 2008. Participants: Stratified random sampling was used to select undergraduate students enrolled in courses during spring semesters in 2002, 2004, 2006, and 2008. Methods: Data were collected during regularly scheduled classes for 4 measures of alcohol consumption and 5 demographic categories using the Core Alcohol and Drug Survey. Results: Four groups showed significant increases in both frequency and volume of alcohol consumption—students who were female, over 21 years of age or over, living off-campus, or performing well academically. There were no decreasing trends for any demographic group. These results differ from national college health surveys, which have shown alcohol use remaining steady during this period. Conclusions: Campus-specific trend data can provide unique perspectives and guide programming efforts. These trends suggest a need for new intervention strategies on this campus.     

Dynamics of Current Account Deficit: A Lesson from Pakistan

This study investigates the determinants of the current account deficit in Pakistan by using the annual time series data for the period from 1976 to 2010. The cointegration results suggest the positive and significant long run relationship of the current account deficit with the exchange rate, trade deficit and fiscal deficit while a significant negative relationship is found with external debt and private saving. The error correction model also confirms the significant positive relationship of the current account deficit with trade deficit and fiscal deficit in the short run. The Granger-causality test shows the bidirectional causal relationship of exchange rate and external debt with current account deficit. While, unidirectional causality is found from current account deficit to trade deficit and private savings. It is recommended that the government needs to be cautious in financing its fiscal deficit. Savings habits should be increased to narrow the investment gap in economy.     

Ethnic Resurgence,Minority Communities,and State Policies in a Network Society: The Dynamics of Malay Identity Formation in Postcolonial Singapore

While much has been written about identity formation and the politics of ethnicity among minority communities in various parts of modern-day Southeast Asia, the same cannot be said regarding the Malay community of Singapore. This article seeks to address this scholarly neglect by bringing into sharp focus the dynamics, processes, and circumstances that shaped Malay identity in postcolonial Singapore during the 1980s. By interweaving historical data with theoretical insights derived from the works of Andrew Willford, Manuel Castells, and Richard Jenkins, among others, this article provides an analytical reading of the global, regional, and local developments that brought about an ethnic resurgence within one of the largest minority groups in this island city-state. Such developments prompted the Singapore government to devise new laws and employ multi-faceted strategies to regain its legitimacy in the eyes of a certain segment of the population, and to enhance its ruling capacity. The problematics embedded within the state's interpretation of Malay identity and the effects of citizen resistance against state policies are considered in detail in the final sections of this article.     

Effect of outgroup social categorization by host-country nationals on expatriate premature return intention and buffering effect of mentoring

Outgroup social categorization by host-country nationals (HCNs) is a common challenge for expatriates and it has received inadequate scholarly attention in expatriate research. This study explores how outgroup social categorization affects expatriate intention to terminate international assignments prematurely and how this adversity can be lessened through organizational mentoring interventions. We theorize that outgroup social categorization by HCNs results in social isolation for expatriates, which triggers expatriates' early return intentions, and mentoring mitigates this indirect effect. The hypotheses were supported by the analyses of multisource data collected from expatriates and their local co-workers in multinational enterprises operating in China. Theoretical and practical implications of the research findings are discussed.     

THREE-WAY STRATIFICATION SAMPLING DESIGN WHEN ONE OF THE STRATIFYING VARIABLES IS TIME

Bryant, Hartley & Jessen (1960) presented a two‐way stratification sampling design when the sample size n is less than the number of strata. Their design was extended to a three‐way stratification case by Chaudhary & Kumar (1988) , but this design does not take into account serial correlation, which might be present as a result of the presence of a time variable. In this paper, a new sampling procedure is presented for three‐way stratification when one of the stratifying variables is time. The purpose of such a design is to take into account serial correlation. The variance of the unweighted estimator of the population mean with respect to a super population model is used as the basis for comparison. Simulation results show that the suggested design is more efficient than the Chaudhary & Kumar (1988) design.     

Estimation in a competing risks proportional hazards model under length-biased sampling with censoring

What population does the sample represent? The answer to this question is of crucial importance when estimating a survivor function in duration studies. As is well-known, in a stationary population, survival data obtained from a cross-sectional sample taken from the population at time $t_0$ represents not the target density $f(t)$ but its length-biased version proportional to $tf(t)$ , for $t>0$ . The problem of estimating survivor function from such length-biased samples becomes more complex, and interesting, in presence of competing risks and censoring. This paper lays out a sampling scheme related to a mixed Poisson process and develops nonparametric estimators of the survivor function of the target population assuming that the two independent competing risks have proportional hazards. Two cases are considered: with and without independent censoring before length biased sampling. In each case, the weak convergence of the process generated by the proposed estimator is proved. A well-known study of the duration in power for political leaders is used to illustrate our results. Finally, a simulation study is carried out in order to assess the finite sample behaviour of our estimators.     

Maximum likelihood estimation of variance components of heteroscedastic random anova model

the estimation of variance components of heteroscedastic random model is discussed in this paper. Maximum Likelihood (ML) is described for one-way heteroscedastic random models. The proportionality condition that cell variance is proportional to the cell sample size, is used to eliminate the efffect of heteroscedasticity. The algebraic expressions of the estimators are obtained for the model. It is seen that the algebraic expressions of the estimators depend mainly on the inverse of the variance-covariance matrix of the observation vector. So, the variance-covariance matrix is obtained and the formulae for the inversions are given. A Monte Carlo study is conducted. Five different variance patterns with different numbers of cells are considered in this study. For each variance pattern, 1000 Monte Carlo samples are drawn. Then the Monte Carlo biases and Monte Carlo MSE’s of the estimators of variance components are calculated. In respect of both bias and MSE, the Maximum Likelihood (ML) estimators of variance components are found to be sufficiently good.     

A relational perspective on gender equality and mainstreaming

This paper offers a relational, multilevel perspective on gender equality and mainstreaming. It argues that single-level conceptualizations of equality within organizational or legal policy domain may not fully capture the multilevel and contextual nature of gender equality and mainstreaming. Based on a review of macro-level factors (e.g. laws, policies, and culture), meso-level factors (e.g. organizational interventions), and micro-level factors (e.g. intersection of gender with social class and family status) in Pakistan, the paper develops a contextual perspective on gender mainstreaming to achieve gender equality at multiple levels.     

Deparochialising the Canon: The Case of Sociological Theory

Sociological theory is not irrelevant to the South but needs to be deparochialised. The parochiality of sociological theory as it exists today can clearly be seen from the canon. The canon would have us believe that sociological theory was the sole creation of a few white men who lived in the nineteenth century. The absence of non-European thinkers in accounts of the history of sociological theory is particularly glaring in cases where non-Europeans had not only contributed to systematic thinking about the nature of society in the modern period but also influenced the development of sociology in the West. Typically, a history of social thought or a course on social thought and theory would cover theorists such as Montesquieu, Vico, Comte, Spencer, Marx, Weber, Durkheim, Simmel, Toennies, Sombart, Mannheim, Pareto, Sumner, Ward, Small, and others. Generally, both non-Western thinkers as well as women founders are excluded. Although sociology is slow to take a decolonial turn, there are now efforts to critique and rethink the canon. This article is a contribution in the direction of critiquing and expanding the canon to render it less parochial.