Writing in this journal, Sumner (2004) advocates use of long lag lengths when conducting co-integration tests. Replication of Sumner's consumption model suggests long lag lengths are a mis-specification: the true underlying model is periodic. We test for periodically distributed unit roots -...

Identifying urban flooding risk hotspots is one of the first steps in an integrated methodology for urban flood risk assessment and mitigation. This work employs three GIS-based frameworks for identifying urban flooding risk hotspots for residential buildings and urban corridors. This is done by...

An agent who is near-rational in the sense of Akerlof and Yellen makes a slight mistake which has only a first-order effect ohnhis own utility. If he is constrained by a participation constraint on another party, as in a principal-agent relationship, the result only holds when the agent is...