Effects of multicomponent training on functional fitness in older adults

The purpose of this study was to evaluate the effects of a 9-week supervised multicomponent exercise program on functional fitness and body composition in independent older adults. Forty-two adults age 60-86 years were randomly assigned to an exercise or a control group and were evaluated before and after training. The training program consisted of 3 sessions of walking, strengthening, and flexibility exercises per week. The multicomponent training program resulted in significant (p < .005) improvements on the chair stand, arm curl, 6-min walk, and up-and-go tests. The findings of this study indicate that a 9-week training program increased upper and lower body strength, aerobic endurance, and agility/dynamic balance in older adults. The most affected components of functional fitness were lower body strength and aerobic endurance. There was no effect of the 9-week training on body composition.     

Self-insurance and consumption risk-sharing between birth-year cohorts in Turkey

This paper tests the empirical validity of the consumption risk-sharing hypothesis across urban and rural regions in Turkey. For this purpose, I analyze fourteen consecutive waves of the TURKSTAT Household Budget Surveys from 2003 to 2016 and prepare a pseudo-panel data set for birth-year cohorts. The empirical analysis shows that there is imperfect consumption risk-sharing between birth-year cohorts in Turkey. We observe that the growth of cohort consumption is positively and significantly associated with both the growth of cohort income and the growth of aggregate consumption. Finally, we find that cohorts would have sacrificed modest amounts to insure their consumption.     

Dividedness,Institutions and Economic Performance: A Cross-National Analysis of Democratic Stability

Why divided societies face particular obstacles in maintaining democracy is one of the most challenging questions posed in the literature. Several studies posit that ethnically, religiously, and linguistically divided societies are incapable of establishing and holding a democratic system because of their social divisions and institutional weaknesses. We challenge this argument and examine whether political institutional arrangements (constraints over the executive, geographic distribution of political power, and form of government) in addition to economic performance are the crucial factors of success to establish and sustain a democratic regime and social unity in divided states. We use the Quality of Governance time-series standard dataset to test this hypothesis. By analyzing data on 163 states (1960–2012) we find that institutional constraints imposed over the executive and economic performance are the two primary influential factors in sustaining democratic regimes in multi-ethnic, multi-linguistic, and multi-religious societies.     

The impact of labour income risk on household saving decisions in Turkey

This paper analyses the Household Budget Surveys prepared by the Turkish Statistical Institute to reveal the empirical importance of precautionary saving in Turkey. The most difficult aspect of the empirical analysis is the approximation of labour income risk as a proxy variable for future labour income uncertainty. Individual disposable income is interacted alternately with the probability of being unemployed and with the probability of job loss in the next period to generate the labour income risk variables. The econometric results support the precautionary saving hypothesis and labour income risk emerges as one of the main determinants of household saving decisions. Moreover, households implement alternative strategies to smooth out their income streams such as holding a second job and increasing the number of income earners in the family. However, it is evident that they are still vulnerable against labour income risk, which underlines the need for an effective and efficient social security system.     

Comparison of confidence intervals for the Behrens-Fisher problem

The Behrens–Fisher problem concerns the inferences for the difference between means of two independent normal populations without the assumption of equality of variances. In this article, we compare three approximate confidence intervals and a generalized confidence interval for the Behrens–Fisher problem. We also show how to obtain simultaneous confidence intervals for the three population case (analysis of variance, ANOVA) by the Bonferroni correction factor. We conduct an extensive simulation study to evaluate these methods in respect to their type I error rate, power, expected confidence interval width, and coverage probability. Finally, the considered methods are applied to two real dataset.     

Equal Learning Does Not Result in Equal Remembering: The Importance of Post‐Encoding Processes

Explanations of variability in long‐term recall typically appeal to encoding and/or retrieval processes. However, for well over a century, it has been apparent that for memory traces to be stored successfully, they must undergo a post‐encoding process of stabilization and integration. Variability in post‐encoding processes is thus a potential source of age‐related and individual variance in long‐term recall. We examined post‐encoding variability in each of two experiments. In each experiment, 20‐month‐old infants were exposed to novel three‐step sequences in each of three encoding conditions: watch only, imitate, and learn to criterion. They were tested for recall after 15 min (as a measure of the success of encoding) and either weeks (1, 2, or 3: Experiment 1) or days (1, 2, or 4: Experiment 2) later. In each experiment, differential relative levels of performance among the conditions were observed at the two tests. The results implicate post‐encoding processes are a source of variance in long‐term recall.     

Lesbian,Gay, Bisexual,and Transgender Families

This article reviews new scholarship on lesbian, gay, bisexual, and transgender families. The past decade witnessed rapid expansion of data and strong research designs. The most notable advance was in studies on variation among mostly planned lesbian comother families. Cumulative evidence suggests that although many of these families have comparatively high levels of shared labor and parental investment, they may not be as “genderless” as previously depicted. Gay men's diverse paths to family formation and planned parenthood have also been explored, but almost no research studies their children's experiences. Conceptualizations of sexual orientation expanded to include bisexuals and others, and some understanding of the experiences of transgender people has begun to emerge. Future work should explore relationships among members of the families they create.