Masataka Harada

Fukuoka University · Department of Economics

While existing studies highlight features of violence in conventional civil wars, they overlook how war technology is linked to the tactics of armed forces. To shed light on the understudied phenomenon of semi-technologized regular forces in a civil war, this article explores why and how violence is executed by such forces. To do so, we examine pat...

We demonstrate that intergovernmental transfers affect migration decisions. If local governments with large distributive allocations offer greater government employment, public works projects, and assistance to (small) businesses, they attract low-skilled or unemployed residents to move or stay in. We find that more allocations increase not only th...

The aim of this study was to investigate the effect of the COVID-19 pandemic on regular clinic visits among people with diabetes and to elucidate the factors related to visit patterns among these patients during the pandemic. This was a longitudinal study using anonymized insurance claims data from the Joint Health Insurance Society in Tokyo from O...

What kind of legacy does war violence leave for future societies? Among many factors that humans can control, war often affects the highest number of people; several studies have looked at the long-term effects of war violence on present socioeconomic outcomes. The conclusions, however, are generally divided into two competing claims, namely those...

CV

How do people change their healthcare behavior when a public health crisis occurs? Within a year of its emergence, coronavirus disease 2019 (COVID-19) has gradually infiltrated our lives and altered our lifestyles, including our healthcare behaviors. In Japan, which faces China across the East China Sea and accepted 924,800 Chinese tourists in Janu...

Supporting info item

When estimating causal effects, unmeasured confounding and model misspecification are both potential sources of bias. We propose a method to simultaneously address both issues in the form of a semi-parametric sensitivity analysis. In particular, our approach incorporates Bayesian Additive Regression Trees into a two-parameter sensitivity analysis s...

A major obstacle to developing evidenced-based policy is the difficulty of implementing randomized experiments to answer all causal questions of interest. When using a nonexperimental study, it is critical to assess how much the results could be affected by unmeasured confounding. We present a set of graphical and numeric tools to explore the sensi...

What effect does the financial cost of running for office have on candidate entry decisions, and does it differ depending on a candidate’s motivations for running? We use a regression discontinuity design and panel data analysis to estimate the causal effect of campaign costs on candidate entry in Japan, where the amount of money required as a depo...

The choice between fixed and random effects In prior chapters, group-specific effects were assumed to be drawn from a distribution, typically Gaussian. In applied research in the social and behavioral sciences, economics, public health, public policy, and many other fields, alternatives to this choice are often made, with the most common being the...

This study uses historical data from the 1965 Voting Rights Act (VRA) to examine the effect of strategic policy making on policy outcomes. Strategic policy making refers to the exploitation of future policy resources by an incumbent government when it anticipates the policy change by a future government. In the South, the segregationist governments...

This study introduces the Generalized Sensitivity Analysis (GSA), which is a simple computational method for sensitivity analysis for unobserved confounder. Specifically, GSA generates the two dimensional figure similar to those in Imbens (2003), in which the magnitude of potential bias due to the omission of an unobservable is measured in terms of...

Theory: The strategic use of public debts (SUPD) by Tabellini and Alesina (1990) (TA) claims when policies are expected to change in future, the current median voter overissues public debts so that the overissuance constrains the fiscal decision of a future median voter. Hypotheses: The Voting Rights Act (VRA) of 1965 designated the states and coun...

Abstract will be provided by author.

isa produces a figure for the sensitivity analysis developed by Imbens (American Economic Review, 2003). Observational studies cannot control for the bias due to the omission of unobservables. The sensitivity analysis provides a benchmark about how strong assumption about unobservables researchers need to make to maintain the causal interpretation.

gsa produces a figure for the sensitivity analysis similar to Imbens (American Economic Review, 2003). Observational studies cannot control for the bias due to the omission of unobservables. The sensitivity analysis provides a graphical benchmark about how strong assumption about unobservables researchers need to make to maintain the causal interpr...