Northeast India is one of the world’s most seismically active regions. The event data included in this research for period 1737–2012 mostly obtained from worldwide database agencies such as ISC, NEIC, and GCMT. Historical seismicity collected published unpublished documents some earthquake events are Indian Meteorological Department Bulletins. As Mw scale developed validated southern California...

In this paper we discuss an estimator for average treatment effects known as the augmented inverse propensity weighted (AIPW). This estimator has attractive theoretical properties and only requires practitioners to do two things they are already comfortable with: (1) specify a binary regression model for the propensity score, and (2) specify a regression model for the outcome variable. After ex...

The US Supreme Court, many state constitutions, and numerous judicial opinions require that legislative districts be “compact,” a concept assumed so simple that no definition is offered other than “you know it when you see it.” Academics, in contrast, have concluded that the concept is so complex that it has multiple theoretical dimensions requiring large numbers of conflicting empirical measur...

Political scientists tend to think about causality in terms of mechanisms. In this paper we argue that non-parametric structural equation models are consistent with how many empirical political scientists think about causality and are consistent with the powerful and well-respected Neyman-Rubin Causal Model. Furthermore, using examples we demonstrate that two important practical questions are m...

In this paper we discuss an estimator for average treatment effects known as the augmented inverse propensity weighted (AIPW). This estimator has attractive theoretical properties and only requires practitioners to do two things they are already comfortable with: (1) specify a binary regression model for the propensity score, and (2) specify a regression model for the outcome variable. After ex...