This paper proposes a within estimator for three-level data, such as time-variant bilateral trade flows. The estimator helps to address the computational difficulties in estimating, for instance, the gravity model of bilateral trade that needs to control for unobserved country-pair and...

Despite recent theoretical literature highlighting the cross effects between preferential trade agreements (PTAs), like the domino effect and the competitive liberalization theory, little has been done to quantify their impact on bilateral trade flows. This paper investigates how preexisting...

This paper assesses quantitatively the impact on student performance of a blended learning experiment within a large undergraduate first year course in statistics for business and economics students. We employ a differences- in-difference econometric approach, which controls for differences in...

Since Rose’s (2004) striking finding of negligible WTO trade effects, numerous studies have at- tempted to solve the so-called WTO puzzle. These studies adopt novel model specifications to control for potential sources of bias, but often lead to conflicting results. Multilateral...

To separately identify the effects of single-sex “schooling†versus single- sex “schoolsâ€, we exploit two unusual experiments in South Korea: students are randomly assigned to academic high schools within districts regardless of school types, and some schools changed their...

This paper empirically examines whether and how similarity in country characteristics affects the changes in trade flows amongst member countries under a preferential trade agreement (PTA). It demonstrates that accounting for similarity in size, income and loca- tion of member countries is...

Conventional estimate of the trade diversion (TD) effect of preferential trade agreements (PTAs) tends to be much smaller than that of the trade creation (TC) effect. This paper ex- amines two sources of estimation bias of the TD effect. The first bias of TD arises from the difficulty in...

The empirical trade literature has long been puzzled by the finding of a large and non-decreasing distance coefficient in the gravity equation amid falling transportation costs over time. To shed new light on this puzzle, the recent theoretical literature shifts its focus to the differential...