Previous work studying the age distribution of citations for patents relies on functional form assumptions to address the co-linearity between the birth year, citation year, and age. This paper proposes a non-parametric identification strategy that uses the lag between application and grant as a...

Previous research studies the age profile of patent citations to learn about knowledge flows over time. However, identification is problematic because of the collinearity between application year, citation year, and patent age. We show empirically that a patent's ‘citation clock’ does not...

The degree of competition in the nursing home industry has profound implications for regulations, quality and pricing decisions. This paper presents a model of spatial competition in the nursing home industry to investigate how consumer preferences over location can affect the substitutability...

A growing body of research uses patent citations to analyze economic phenomena, and many of these papers are interested in the distribution of citations over the life of a patent. However, this question leads directly to the age-year-cohort identification problem, i.e. co-linearity between the...

As severe disasters increase and intensify, federal, state, and local governments are continuing to adapt their responses. The needs of low-income renters are particularly acute. Three recent studies by some of the authors of this working paper analyze the intersection of environmental disasters...

<Para ID="Par1">During 2013–2014, the Antitrust Division of the U.S. Department of Justice brought a wide range of matters to successful conclusions. The three matters that are discussed below demonstrate the diverse set of issues that the division examines every year. Copyright Springer Science+Business...</para>