Documents Melina, Giovanni 2 results

"We analyse the effects of a government spending expansion in a DSGE model with Mortensen-Pissarides labour market frictions, deep habits in private and public consumption, investment adjustment costs, a constant-elasticity-of-substitution (CES) production function, and adjustments in employment both at the intensive as well as the extensive margin. The combination of deep habits and CES technology is crucial. The presence of deep habits magnifies the responses of macroeconomic variables to a fiscal stimulus, while an elasticity of substitution between capital and labour in the range of available estimates allows the model to produce a scenario compatible with the observed jobless recovery."

"This paper examines the uneven global impact of AI, highlighting how its effects will be a function of (i) countries' sectoral exposure to AI, (ii) their preparedness to integrate these technologies into their economies, and (iii) their access to essential data and technologies. We feed these three aspects into a multi-sector dynamic general equilibrium model of the global economy and show that AI will exacerbate cross-country income inequality, disproportionately benefiting advanced economies. Indeed, the estimated growth impact in advanced economies could be more than double that in low-income countries. While improvements in AI preparedness and access can mitigate these disparities, they are unlikely to fully offset them. Moreover, the AI-driven productivity gains could reduce the traditional role of exchange rate adjustments due to AI's large impact in the non-tradable sector—a mechanism akin to an inverse Balassa-Samuelson effect."