We develop a model to study the macroeconomic effects of public investment surges in low-income countries, making explicit: (i) the investment-growth linkages; (ii) public external and domestic debt accumulation; (iii) the fiscal policy reactions necessary to ensure debt-sustainability; and (iv)...

We reconsider the macroeconomic implications of public investment efficiency, defined as the ratio between the actual increment to public capital and the amount spent. We show that, in a simple and standard model, increases in public investment spending in inefficient countries do not have a...

We may be on the cusp of a 'second industrial revolution' based on advances in artificial intelligence and robotics. We analyze the implications for inequality and output, using a model with two assumptions: 'robot' capital is distinct from traditional capital in its degree of substitutability...