This paper studies the impact of U.S. immigration barriers on global knowledge production. We present four key findings. First, among Nobel Prize winners and Fields Medalists, migrants to the U.S. play a central role in the global knowledge network—representing 20-33% of the frontier knowledge producers. Second, using novel survey data and hand-curated life-histories of International Math Olympiad (IMO) medalists, we show that migrants to the U.S. are up to six times more productive than migrants to other countries—even after accounting for talent during one’s teenage years. Third, financing costs are a key factor preventing foreign talent from migrating abroad to pursue their dream careers, particularly for talent from developing countries. Fourth, certain ‘push’ incentives that reduce immigration barriers—by addressing financing constraints for top foreign talent—could increase the global scientific output of future cohorts by 42 percent. We concludeby discussing policy options for the U.S. and the global scientific community.
International Monetary Fund. Communications Department
“EVERYBODY TALKS ABOUT the weather, but nobody does anything about it.” The quip, attributed to 19th-century American humorist Mark Twain, might describe the current state of play on climate change. In Twain’s day, it was absurd to suppose humans could do anything about the weather.
This Climate Change Policy Assessment (CCPA) takes stock of the Federated States of Micronesia (FSM)’s climate response plans, from the perspective of their macroeconomic and fiscal implications. CCPA explores the possible impact of climate change and natural disasters and the cost of FSM’s planned response. It suggests macroeconomically relevant reforms that could strengthen the national strategy and identifies policy gaps and resource needs. FSM has made progress toward its Nationally Determined Contribution mitigation pledge by beginning to expand renewable power generation and improve its efficiency. The authorities plan to continue this and encourage the take-up of energy efficient building design and appliances. Accelerating adaptation investments is paramount, which requires addressing critical capacity constraints and increasing grant financing. It is recommended that FSM needs to increase its capacity to address natural disaster risks following the expiry of Compact-related assistance in 2023. It is advised to improve climate data collection and use, including on the costs of high and low intensity disasters and disaster response expenditure.
Climate change is one of the greatest challenges of this century. Mitigation requires a large-scale
transition to a low-carbon economy. This paper provides an overview of the rapidly
growing literature on the role of macroeconomic and financial policy tools in enabling this
transition. The literature provides a menu of policy tools for mitigation. A key conclusion is
that fiscal tools are first in line and central, but can and may need to be complemented by
financial and monetary policy instruments. Some tools and policies raise unanswered
questions about policy tool assignment and mandates, which we describe. The literature is scarce, however, on the most effective policy mix and the role of mitigation tools and goals
in the overall policy framework.
Stefan Mittnik, Willi Semmler, and Alexander Haider
Recent research in financial economics has shown that rare large disasters have the potential to disrupt financial sectors via the destruction of capital stocks and jumps in risk premia. These disruptions often entail negative feedback e?ects on the macroecon-omy. Research on disaster risks has also actively been pursued in the macroeconomic models of climate change. Our paper uses insights from the former work to study disaster risks in the macroeconomics of climate change and to spell out policy needs. Empirically the link between carbon dioxide emission and the frequency of climate re-lated disaster is investigated using cross-sectional and panel data. The modeling part then uses a multi-phase dynamic macro model to explore this causal nexus and the e?ects of rare large disasters resulting in capital losses and rising risk premia. Our proposed multi-phase dynamic model, incorporating climate-related disaster shocks and their aftermath as one phase, is suitable for studying mitigation and adaptation policies.
Gail Cohen, João Tovar Jalles, Mr. Prakash Loungani, and Ricardo Marto
For the world's 20 largest emitters, we use a simple trend/cycle decomposition to provide evidence of decoupling between greenhouse gas emissions and output in richer nations, particularly in European countries, but not yet in emerging markets. If consumption-based emissions—measures that account for countries' net emissions embodied in cross-border trade—are used, the evidence for decoupling in the richer economies gets weaker. Countries with underlying policy frameworks more supportive of renewable energy and climate change mitigation efforts tend to show greater decoupling between trend emissions and trend GDP, and for both production- and consumption-based emissions. The relationship between trend emissions and trend GDP has also become much weaker in the last two decades than in preceding decades.