Consolidated Measures of Activity among Older Adults: Results of a Three Data Set Comparison

This study explores the potential to consolidate a broad range of activity items to create more manageable measures that could be used in statistical modeling of multi-activity engagement. We utilized three datasets in the United States: Panel Study of Income Dynamics, Health and Retirement Study, and Midlife in the United States. After identifying activity items, exploratory and confirmatory factor analysis were used to empirically explore composite activity measures. Findings suggest that discrete activity items can be consolidated into activity domains; however, activity domains differ across datasets depending on availability of activity items. Implications for research and practice are further discussed.     

A MONTE CARLO COMPARISON OF VARIOUS ASYMPTOTIC APPROXIMATIONS TO THE DISTRIBUTION OF INSTRUMENTAL VARIABLES ESTIMATORS

We examine empirical relevance of three alternative asymptotic approximations to the distribution of instrumental variables estimators by Monte Carlo experiments. We find that conventional asymptotics provides a reasonable approximation to the actual distribution of instrumental variables estimators when the sample size is reasonably large. For most sample sizes, we find Bekker[11] asymptotics provides reasonably good approximation even when the first stage R² is very small. We conclude that reporting Bekker[11] confidence interval would suffice for most microeconometric (cross-sectional) applications, and the comparative advantage of Staiger and Stock[5] asymptotic approximation is in applications with sample sizes typical in macroeconometric (time series) applications.     

Strength-training behavior and perceived environment among Japanese older adults

The authors examined the relationship between strength-training behavior and perceived environment in older Japanese adults. An Internet-based survey was conducted of 293 adults age 68.2 ± 2.8 yr. The dependent variable was regular strength-training behavior. The IPAQ environment module, access to facilities for strength training, and home equipment for strength training were environmental factors. Logistic-regression analysis was employed. After demographic variables (gender, age, educational background, household income, body-mass index, self-rated health status, smoking habit, and residential area) were adjusted for, home equipment for strength training (OR = 2.14, 95% CI = 1.50-3.06), access to facilities for strength training (OR = 2.53, 95% CI = 1.32-4.85), and observing active people (OR = 2.20, 95% CI = 1.06-4.58) were positively correlated with regular strength-training behavior. In conclusion, environmental factors associated with strength-training behavior were access to facilities for strength training, having home equipment for strength training, and observing active people.     

Event‐Related Attributes Affecting Donation Intention of Special Event Attendees

The practice of increasing donations through special events has significant financial implications for charitable organizations. However, little is known about how such events can be organized to increase individuals’ donation intention beyond their event attendance. In this case study, a post‐event survey was conducted with attendees of a professional golf tournament operating as a special event to identify event‐related attributes that affected their intention to donate to the cause supported by the event. The results indicate that attendees’ donation intention was positively associated with their event satisfaction, perceived contributions of the event to the cause, and sense of camaraderie at the event. Furthermore, the effects of event satisfaction and camaraderie were stronger for attendees whose primary motivation for attending the event was unrelated to cause support. These results support hypotheses drawn from social exchange theory and provide implications for charitable organizations engaging in special events.     

Methods for Studying Generalized Birthday and Coupon Collection Problems

In this paper, we consider generalizations of two classical probability problems: the birthday problem and the coupon collector's problem. These problems are discussed in terms of urn models and captured through generating functions. Some methods for the study of the problems are presented. Furthermore, we also formulate the generalized birthday and coupon collector's problems as the waiting time problems. In each case, numerical examples are given in order to illustrate the feasibility of our methods.     

高中生自我重塑教育和语言教育相关性研究

针对日本高中学生普遍存在的语言表达能力低下、语言教学和文化教学相互脱节的现象,我们认为应该从学习使用全民共同使用的新鲜语言、跟时代紧密结合的语言以及尊重个体生命的语言等方面,对学生进行自我重塑教育。同时,我们以几个英语基本动词为例,探讨英语教学中语言和文化的密切关系。