In contrast to recent interest in the effects of student-driven collaborations on learning outcomes, little or no previous empirical investigations have examined the potential benefits from collaboration between instructors of separate but related courses. This study explicitly accounts for...

The paper considers the use of directed acyclic graphs (DAGs), and their construction from observational data with PC-algorithm TETRAD II, in providing over-identifying restrictions on the innovations from a vector autoregression. Results from Sims' 1986 model of the US economy are replicated...

"This paper investigates causation contemporaneously and dynamically to elucidate the persistent lack of agreement about what "causes" changes in farmland prices. The analysis synthesizes and extends previous investigations in this area by employing a combination of directed acyclic graphs...