Using a time series of fifty years, the relationships between investment by telecommunications firms and Gross Domestic …-stationarity of the data and lag length. These tests indicate that investment by telecommunications firms is caused by, but does not … stimulating the U.S. economy by accelerating investment in the telecommunications sector may not be successful …

to initiate adequate investment incentives. Using a two-equation estimation approach, a direct competition effect (more … still found, the estimation results confirm the idea of asymmetric substitutability between telecommunication … infrastructures. -- Telecommunications ; infrastructure supply and demand …