Regression model for surrogate data in high dimensional statistics

Abstract

This paper deals with the problem of estimating the regression of a surrogated scalar response variable given a functional random one. We construct an estimator of the regression operator by using, in addition to the available (true) response data, a surrogate data. We then establish some asymptotic properties of the constructed estimator in terms of the almost-complete and the quadratic mean convergences. Notice that the obtained results generalize a part of the results obtained in the finite dimensional framework. Finally, an illustration on the applicability of our results on both simulated data and a real dataset was realized. We have thus shown the superiority of our estimator on classical estimators when we are lacking complete data.     

Bayesian inference for random coefficient dynamic panel data models

We develop a hierarchical Bayesian approach for inference in random coefficient dynamic panel data models. Our approach allows for the initial values of each unit's process to be correlated with the unit-specific coefficients. We impose a stationarity assumption for each unit's process by assuming that the unit-specific autoregressive coefficient is drawn from a logitnormal distribution. Our method is shown to have favorable properties compared to the mean group estimator in a Monte Carlo study. We apply our approach to analyze energy and protein intakes among individuals from the Philippines.     

Is Materialism All That Bad? Effects on Satisfaction with Material Life, Life Satisfaction, and Economic Motivation

The literature in economic psychology and quality-of-life studies alludes to a negative relationship between materialism and life satisfaction. In contrast, the macroeconomic literature implies a positive relationship between material consumption and economic growth. That is, materialism may be both good and bad. We develop a model that reconciles these two contrasting viewpoints by asserting that materialism may lead to life dissatisfaction when materialistic people evaluate their standard of living using fantasy-based expectations (e.g., ideal expectations), which increases the likelihood that they would evaluate their standard of living negatively. In turn, dissatisfaction with standard of living increases the likelihood that they would evaluate their life negatively. However, materialistic people who evaluate their standard of living using reality-based expectations (e.g., ability expectations) are likely to feel more economically motivated than their non-materialistic counterparts, and this economic motivation is likely to contribute significantly and positively to life satisfaction. Survey data were collected from seven major cities each in a different country (Australia, Bosnia/Herzegovina, Germany, Egypt, Korea, Turkey, and the USA) using a probability sample (cluster sampling method involving income stratification). The results provide support for the model. The economic public policy implications concerning how people evaluate their standard of living using ability-based expectations are discussed in the context of the ideals of meritocracy.     

Linking Advertising,Materialism, and Life Satisfaction

This paper develops theory related to advertising, materialism, and life satisfaction by formally testing explanations related to the antecedents and consequences of materialism. Survey data were collected from seven major cities each in a different country (Australia, Bosnia/Herzegovina, Germany, Egypt, Korea, Turkey, and the USA) using a probability sample (cluster sampling method involving income stratification). The results showed that the extent to which advertising is perceived to be materialistic contributes to materialism. Materialism, in turn, leads to the frequent use of various standards of comparison in making judgments about standard of living. As judgments about standard of living increase, standard of living is evaluated more negatively. In turn, negative self-evaluations contribute significantly to dissatisfaction with life.     

Perceived Racial Discrimination in Health Care and Race Differences in Physician Trust

Racial discrimination in health care is more often perceived by racial minority patients than by whites. In this study, we explored whether two types of perceived racial discrimination, perceptions that the healthcare system is racially biased in general (perceived institutional racial discrimination) and perceptions that one has personally encountered racial discrimination while seeking health care (perceived interpersonal racial discrimination), mediated racial differences in patients’ trust in physicians. We examined this in a sample of black (N = 127) and white (N = 303) patients being treated in two Veterans Affairs orthopedic clinics for advanced osteoarthritis. Patients completed measures of perceived institutional and interpersonal racial discrimination in health care before meeting with an orthopedic surgeon and a measure of physician trust after the visit. Using a multiple mediator bootstrapping procedure, we tested whether perceived institutional and/or interpersonal racial discrimination mediated the association between race and trust. Compared to whites, blacks reported lower physician trust (M = 4.00 vs. 4.17, β = ?0.15, 95 % CI = ?0.25, ?0.05), more perceived institutional racial discrimination (M = 3.13 vs. 2.60, β = 0.43, 95 % CI = 0.25, 0.61), and more perceived interpersonal racial discrimination (M = 1.94 vs. 1.21, β = 0.60, 95 % CI = 0.47, 0.74). Perceived interpersonal, but not institutional, racial discrimination mediated the race difference in physician trust and accounted for 55 % of the variance. Our finding that lower physician trust among black patients than white patients was explained by perceptions of interpersonal racial discrimination in health care suggests that issues of racial discrimination may need to be addressed in order to foster minority patients’ trust in physicians.     

Labour Policy and Determinants of Employment and Wages in a Developing Economy with Labour Shortage

Using data from a sample of 1,099 workers, this paper investigates the determinants of employment and wages for workers in the United Arab Emirates. The paper further examines the wage distribution and the decomposition of the wage gap between the public and the private sectors. Results of the study are consistent with the dual labour market theory and indicate that the labour market in the United Arab Emirates is segmented based on sectors (public versus private) and types of workers (nationals versus non‐nationals). The study concludes with a discussion of the implication of these findings for the effectiveness of labour and economic policy.     

Understanding the Alternative Globalisation Movement

Resistance to neo‐liberalism had been gathering pace for sometime before it crystallised into the alternative globalisation movement (AGM) in 1999 at the Third Ministerial meeting of the World Trade Organisation in Seattle, WA, USA. Since then, many more protests have ensued in cities around the globe against the International Monetary Fund, the World Bank, and the G8. The emergence of this phenomenon has precipitated new research and debates for social movement studies and social sciences generally. This paper critically reviews some of the new academic perspectives on the AGM including, post‐structuralist anarchist, autonomist, complexity theorisations, as well as new applications of older social movement theories such as the political process approach and new social movement theory. The paper explains the emergence and establishment of the World Social Forum (WSF) and the theoretical and practical difficulties of a charter which suggests such an inclusive an open ended rubric. Finally, the paper concludes by arguing that further research on the tensions within the WSF and the AGM is required if an answer is to be provided to the question: Is another World Possible?     

The Securitization of Migration: A Racial Discourse1

As we enter the informational economy, freedom of human mobility has nearly disappeared. Instead, powerful words are travelling the globe unhindered: risk and security. They are being strung together with the present “migration phenomena”, leaving migrants bound by the chain of the new security discourse: the securitization of migration. This discourse is racism's most modern form. Discursive practices, as seen through the press portrayal of 599 migrants reaching Canada's western coast, have transformed migrants into agents which threaten “human security” How discourse informs government policy is illustrated through an examination of Canada's new immigration legislation.