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Macroeconomic theory suggests that public capital investment makes a significant contribution to economic growth. Applying an error correction model to data series for Germany shows, however, that increases in public infrastructure capital reduce private sector costs only in a negligible way. Moreover, it is demonstrated that conditional demand functions can only provide for very restricted predictions of how additional public investment outlays affect the demand for labor and private capital.

Langfristige Wirkungen öffentlicher Investitionen –Theoretische und empirische Aspekte –