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Working Paper
Partisan cycles and the consumption volatility puzzle
Standard real business cycle theory predicts that consumption should be smoother than output, as observed in developed countries. In emerging economies, however, consumption is more volatile than income. In this paper the authors provide a novel explanation of this phenomenon, the ?consumption volatility puzzle,? based on political frictions. They develop a dynamic stochastic political economy model where parties that disagree on the size of government (right-wing and left-wing) alternate in power and face aggregate uncertainty. While productivity shocks affect only consumption through ...
Working Paper
Polarized business cycles
We are motivated by four stylized facts computed for emerging and developed economies: (i) business cycle movements are wider in emerging countries; (ii) economies in emerging countries experience greater economic policy uncertainty; (iii) emerging economies are more polarized and less politically stable; and (iv) economic policy uncertainty is positively related to political polarization. We show that a standard real business cycle (RBC) model augmented to incorporate political polarization, a `polarized business cycle' (PBC) model, is consistent with these facts. Our main hypothesis is that ...
Report
Pandemic Control in ECON-EPI Networks
We develop an ECON-EPI network model to evaluate policies designed to improve health and economic outcomes during a pandemic. Relative to the standard epidemiological SIR set-up, we explicitly model social contacts among individuals and allow for heterogeneity in their number and stability. In addition, we embed the network in a structural economic model describing how contacts generate economic activity. We calibrate it to the New York metro area during the 2020 COVID-19 crisis and show three main results. First, the ECON-EPI network implies patterns of infections that better match the data ...
Briefing
Tariff Update: Incorporating Recent Decisions and Deals
In March, we introduced a benchmark measure of the average effective tariff rate (AETR), using detailed trade data for 2024. We subsequently updated this analysis to reflect the tariff announcements on April 2 (commonly referred to as "Liberation Day") and April 9. This article provides another update by incorporating recent court decisions involving these tariff announcements as well as trade agreements with the U.K. and China, described later in this article in more detail.As in our previous analysis, we report AETRs by country and industry. While the industry-level AETR reflects the direct ...
Briefing
Tariffs: Estimating the Economic Impact of the 2025 Measures and Proposals
Tariffs are taxes imposed by a government on imported goods, typically calculated as a percentage of the import's value (known as an ad valorem tax). Governments use tariffs for various purposes, such as raising revenue, protecting domestic industries from foreign competition and influencing international trade patterns. By increasing the cost of imported products, tariffs encourage consumers to shift toward domestically produced goods, thus supporting local businesses and potentially stimulating domestic economic activity.However, the overall impact of tariffs depends critically on how much ...
Working Paper
Partisan conflict
American politics have become extremely polarized in recent decades. This deep political divide has caused significant government dysfunction. Political divisions make the timing, size, and composition of government policy less predictable. According to existing theories, an increase in the degree of economic policy uncertainty or in the volatility of fiscal shocks results in a decline in economic activity. This occurs because businesses and households may be induced to delay decisions that involve high reversibility costs. In addition, disagreement between policymakers may result in ...
Working Paper
Financial globalization, inequality, and the raising of public debt
During the last three decades, the stock of government debt has increased in most developed countries. During the same period, we also observe a significant liberalization of international financial markets and an increase in income inequality in several industrialized countries. In this paper we propose a multicountry political economy model with incomplete markets and endogenous government borrowing and show that governments choose higher levels of public debt when financial markets become internationally integrated and inequality increases. We also conduct an empirical analysis using OECD ...
Briefing
Tariff Update: Incorporating the April 9 Announcements
This article updates our previous analysis covering the potential effects of announced tariffs by the U.S. As the analysis is quite similar to our previous analysis, much of the text of the article is drawn from the previous article.In our April 2 article examining recent tariff announcements, we constructed a benchmark measure of the average effective tariff rate (AETR) based on detailed trade data for 2024. The analysis quantified the fiscal and trade effects of newly proposed tariffs through a series of counterfactual scenarios. These included tariffs on aluminum and steel, renewed duties ...
Briefing
Why Predicted and Actual Tariff Rates Diverged in May 2025
The predicted average effective tariff rate (AETR) for May 2025 was 17.5 percent, but the actual AETR was only 8.7 percent. This large gap motivated a systematic decomposition of the sources of divergence.Shifts in importer behavior — such as changes in sourcing strategies and product composition — account for part of the gap. In particular, imports from China and other high-tariff countries fell sharply, while imports from lower-tariff countries like Vietnam increased.The largest factor seems to be implementation frictions. Many country-product pairs that were expected to be tariffed ...