When Did We Begin to Spell “Heteros*edasticity” Correctly?

Using digitized texts scanned by Google and subjected to optical character recognition, I show that heteroskedasticity overtook heteroscedasticity as the preferred spelling in 2001 and has continued to dominate, except for 2005, up to 2008. The latest trends indicate that writers are moving toward the k variant. However, for words such as homoskedasticity, heteroskedastic, and homoskedastic, the corresponding spellings using c are still overwhelmingly dominant, albeit slowly shifting.Heteroskedasticity; Culturomics; Google Books; econometric orthography; philology

Compulsory Military Service in Germany Revisited

This paper estimates the causal impact of compulsory military service on men in Germany using social security and pension administrative data for the cohort of individuals born in the period 1932–1942. Due to the combination of laws restricting conscription only to men born on or after July 1, 1937, difference-in-differences estimates of the effect of conscription on average daily wages can be computed using cohorts of women as a comparison group. The results indicate that conscription had no significant impact on a draftee’s labor-market performance, validating an earlier result using an alternative identification strategy.Conscription; difference in differences; German Federal Defense Force

Co-pay and Feel Okay: Evidence of Illusory Health Gains from a Health Insurance Reform

The reliability of general self-rated health status is examined using the reform of the public health insurance system of Germany in 2004 as a source of exogenous variation. Among others, the reform introduced a co-payment for ambulatory doctor visits and increased the co-payments for prescription drugs. This natural experiment allows identification of the causal impact of the program on self-assessed health and hence reveals the sensitivity of this subjective measure to a perturbation in the insurance system. Using data from the German Socio-Economic Panel, the results indicate that after the policy intervention, the respondents in the treated group perceived their own health status as better than their hypothetical untreated state even when there is no discernible impacton actual health.The reliability of general self-rated health status is examined using the reform of the public health insurance system of Germany in 2004 as a source of exogenous variation. Among others, the reform introduced a co-payment for ambulatory doctor visits and increased the co-payments for prescription drugs. This natural experiment allows identification of the causal impact of the program on self-assessed health and hence reveals the sensitivity of this subjective measure to a perturbation in the insurance system. Using data from the German Socio-Economic Panel, the results indicate that after the policy intervention, the respondents in the treated group perceived their own health status as better than their hypothetical untreated state even when there is no discernible impacton actual health.natural experiment,cognitive dissonance,self-rated health status

Co-pay and Feel Okay: Evidence of Illusory Health Gains from a Health Insurance Reform

The reliability of general self-rated health status is examined using the reform of the public health insurance system of Germany in 2004 as a source of exogenous variation. Among others, the reform introduced a co-payment for ambulatory doctor visits and increased the co-payments for prescription drugs. This natural experiment allows identification of the causal impact of the program on self-assessed health and hence reveals the sensitivity of this subjective measure to a perturbation in the insurance system. Using data from the German Socio-Economic Panel, the results indicate that after the policy intervention, the respondents in the treated group perceived their own health status as better than their hypothetical untreated state even when there is no discernible impact on actual health.Natural experiment, cognitive dissonance, self-rated health status

The Regional Economic Effects of Military Base Realignments and Closures in Germany

Within the context of the current political discussion over base realignments and closures (BRACs) in Germany, this study provides policy guidance by examining the economic consequences to the surrounding community. We identify the causal effect of a reduction in military personnel on a number of socioeconomic indicators within the peripheries of military bases. The BRACs within the German armed forces is used an exogenous source of variation that allows for the estimation of the causal effect of a particular demand shock on household income, output, unemployment, and tax revenue within a specified buff er zone around each base. The analysis covers 298 communities for the period 2003–2007. Consistent with evidence found elsewhere, we find that these base adjustments have only a marginal impact on the local community in which the bases are located.Geographic information system; armed forces; regional adjustment

Local Determinants of Crime: Do Military Bases Matter?

Using a unique panel dataset, we estimate the impact of the military base realignments and closures (BRACs) in Germany on the intensity of criminal activity surrounding the base. We use a fixed-effect model to account for time-invariant unobservables in our panel of 298 military bases for the period 2003–2007. We also take advantage of geographic information system software to mitigate estimation issues arising from the spatial nature of the dataset. Estimation results are presented for total crime and four other subcategories: breaking and entering, automobile-related crime, violent crime, and drug-related crime. The estimates indicate that there is no effect of BRACs on criminal activity surrounding the base. We also confirm existing findings in the literature on the determinants of crime.Armed forces; BRAC; deviant behavior; geographic information system

Evaluating the Labor-Market Effects of Compulsory Military Service

We identify the causal effect of compulsory military service on conscripts’ subsequent labor-market outcomes by exploiting the regression-discontinuity design of the military draft in Germany during the 1950s. Unbiased estimates of the effect of military service on lifetime earnings, wages, and employment are obtained by comparing men born before July 1, 1937 (the "White Cohort") who were exempted from compulsory military service to men who were born on or shortly after this threshold date and hence faced a positive probability of being drafted. We find that the putative earnings advantage and wage premium of those who served in the armed forces vanish when selection effects are taken into account.causal effect, quasi-experimental estimators, conscription

The Causal Link Between Financial Incentives and Weight Loss – An Evidence-based Survey of the Literature

Obesity and overweight are linked to diseases that cost society a significant amount of resources. While behavior modification can reduce the problem, instigating such lifestyle changes is an uneasy task. One potential way to reduce the problem is through the use of financial incentives. In this survey, we review the available evidence with a significant emphasis on studies that yield credible estimates of the effect of financial incentives on weight loss. We find that the scientific literature on the subject has not yet satisfactorily settled whether such a mechanism is effective at eliciting the desired behavioral and health outcomes. We therefore advocate a rigorous large-scale randomized experiment to provide reliable estimates of the effect.Financial incentives; weight loss; obesity; randomized experiment; survey

Intrinsic Religiosity, Personality Traits, and Adolescent Risky Behaviors

We investigate the relationship between self-reported importance of religion and risky behaviors in adolescence using data from a large and detailed longitudinal study of English teenagers. We use school and individual fixed effects, and treatment effects with inverse-probability-weighted regression adjustment, controlling for a rich set of characteristics, including individual personality traits. Our results show that individuals with low religiosity are more likely to engage in risky health behaviors

Do Guns Displace Books? – The Impact of Compulsory Military Service on Educational Attainment

Compulsory military service typically drafts young men when they are at the height of their learning ability. Thus, it can be expected to depress the demand for higher education since skill atrophy and the delayed entry into the civilian labor market reduce the returns to human-capital investments. Attending university, however, might open the possibility to avoid the draft, leading to an increase in the demand for tertiary education. To estimate the causal eff ect of conscription on the probability to obtain a university degree, we use a regression-discontinuity design that employs special regulations associated with the introduction of conscription in Germany in 1956. We estimate conscription to increase the probability of having a university degree.Regression discontinuity; conscription; career interruption; skill atrophy;TS2SLS