Using a time series of fifty years, the relationships between investment by telecommunications firms and Gross Domestic Product in the United States are examined. Granger-Sims causality tests are conducted, with proper allowance for both the non-stationarity of the data and lag length. These...

We attempt to shed some light on the optimal design of Commission rules and practices for addressing interference disputes. Since spectrum licenses produce no benefits without large and mostly sunk investments in communications networks, our focus is on investment incentives. We argue that the...