This paper examines the Olsonian thesis that group is size inversely related to successful collective action. We start with an empirical analysis based on primary data. This data gives information on a set of 21 villages in the Indian Himalayas that collectively monitor to protect and conserve...

This paper is concerned with forecasting univariate seasonal time series data using periodic autoregressive models. We show how one should account for unit roots and deterministic terms when generating out-of-sample forecasts. We illustrate the models for various quarterly UK consumption series.