This essay examines the role of data and program-code archives in making economic research 'replicable.' Replication of published results is recognized as an essential part of the scientific method. Yet, historically, both the 'demand for' and 'supply of' replicable results in economics has been...

This paper proposes a dynamic version of the principle of ranking and selection of projects by their benefit cost ratios (BCRs). It permits a very simple and practical technique for adaptive sequential choice to provide incentives for self help, cost control, sharing and maintenance. We discuss...