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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...
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This review examines the literature on the role of infrastructure in determining the productivity and competitiveness …, water, and telecommunications systems increases firm-level productivity. It also shows that providing infrastructure per se … is not enough to boost productivity, unless it offers reliable service. Disruptions and irregular service have …
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