type="main" <title type="main">ABSTRACT</title> <p>This paper uses firm-level data to examine how supply chain networks affected the recovery of firms from the Great East Japan Earthquake. Extensive supply chains can negatively affect recovery through higher vulnerability to network disruption and positively through support...</p>

Studies have suggested that there exists job search and recruiting friction in urban areas. This paper constructs a two-sector &lpar;rural and urban&rpar; model involving this factor and investigates how it affects migration and what the optimal policies should be. An analysis shows that frictional urban...

The rank-size rule and Zipf's law for city sizes have been traditionally examined by means of OLS estimation and the "t" test. This paper studies the accurate and approximate properties of the OLS estimator and obtains the distribution of the "t" statistic under the assumption of Zipf's law...