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Author:Acharya, Sushant 

Discussion Paper
Escaping Unemployment Traps

Economic activity has remained subdued following the Great Recession. One interpretation of the listless recovery is that recessions inflict permanent damage on an economy’s productive capacity. For example, extended periods of high unemployment can lead to skill losses among workers, reducing human capital and lowering future output. This notion that temporary recessions have long-lasting consequences is often termed hysteresis. Another explanation for sluggish growth is the influential secular stagnation hypothesis, which attributes slow growth to long-term changes in the economy’s ...
Liberty Street Economics , Paper 20161116

Report
Liquidity traps, capital flows

Motivated by debates surrounding international capital flows during the Great Recession, we conduct a positive and normative analysis of capital flows when a region of the global economy experiences a liquidity trap. Capital flows reduce inefficient output fluctuations in this region by inducing exchange rate movements that reallocate expenditure toward the goods it produces. Restricting capital mobility hampers such an adjustment. From a global perspective, constrained efficiency entails subsidizing capital flows to address an aggregate demand externality associated with exchange rate ...
Staff Reports , Paper 765

Report
Spillovers and Spillbacks

We study international monetary policy spillovers and spillbacks in a tractable two-country Heterogeneous Agent New Keynesian model. Relative to Representative Agent (RANK) models, our framework introduces a precautionary-savings channel, as households in both countries face uninsurable income risk, and a real-income channel, as households have heterogeneous marginal propensities to consume (MPC). While both channels amplify the size of spillovers/spillbacks, only precautionary savings can change their sign relative to RANK. Spillovers are likely to be larger in economies with higher ...
Staff Reports , Paper 1089

Report
Optimal Monetary Policy According to HANK

We study optimal monetary policy in a heterogeneous agent new Keynesian economy. A utilitarian planner seeks to reduce consumption inequality, in addition to stabilizing output gaps and inflation. The planner does so both by reducing income risk faced by households, and by reducing the pass-through from income to consumption risk, trading off the benefits of lower inequality against productive inefficiency and higher inflation. When income risk is countercyclical, policy curtails the fall in output in recessions to mitigate the increase in inequality. We uncover a new form of time ...
Staff Reports , Paper 916

Report
Slow recoveries and unemployment traps: monetary policy in a time of hysteresis

We analyze monetary policy in a model where temporary shocks can permanently scar the economy's productive capacity. Unemployed workers? skill losses generate multiple steady-state unemployment rates. When monetary policy is constrained by the zero bound, large shocks reduce hiring to a point where the economy recovers slowly at best?at worst, it falls into a permanent unemployment trap. Since monetary policy is powerless to escape such traps ex post, it must avoid them ex ante. The model quantitatively accounts for the slow U.S. recovery following the Great Recession, and suggests that lack ...
Staff Reports , Paper 831

Discussion Paper
Monetary Policy Spillovers and the Role of the Dollar

In the literature on monetary policy spillovers considered in the two previous posts, countries that would otherwise operate independently are connected to one another through bilateral trade relationships, and it is assumed that there are no frictions in currency, financial, and asset markets. But what if we introduce a number of real-world complexities, such as a dominant global currency and tight linkages across international capital markets? Given these additional factors, is it still possible to draw generalized conclusions about international policy spillovers—and can we still think ...
Liberty Street Economics , Paper 20250407c

Working Paper
The Financial Origins of Non-Fundamental Risk

We formalize the idea that the financial sector can be a source of non-fundamental risk. Households' desire to hedge against price volatility can generate price volatility in equilibrium, even absent fundamental risk. Fearing that asset prices may fall, risk-averse households demand safe assets from leveraged intermediaries, whose issuance of safe assets exposes the economy to self-fulfilling fire sales. Policy can eliminate nonfundamental risk by (i) increasing the supply of publicly backed safe assets, through issuing government debt or bailing out intermediaries, or (ii) reducing the ...
Working Paper Series , Paper 2023-20

Discussion Paper
Monetary Policy Spillovers in the Global Economy

Understanding cross-border interdependencies and inspecting the international transmission mechanism of policy shocks is the raison d’être of open-economy macroeconomics as an intellectual discipline. The relevance for the policy debate is pervasive: over and over in the history of the international monetary system national policymakers have pointed at — and voiced concerns about—the effects of policy actions undertaken in foreign countries on the outlook and financial conditions in their own domestic economies. The most recent example involves the spillovers of tighter monetary ...
Liberty Street Economics , Paper 20250407a

Report
Rational inattention in hiring decisions

We provide an information-based theory of matching efficiency fluctuations. Rationally inattentive firms have limited capacity to process information and cannot perfectly identify suitable applicants. During recessions, higher losses from hiring unsuitable workers cause firms to be more selective in hiring. When firms cannot obtain sufficient information about applicants, they err on the side of caution and accept fewer applicants to minimize losses from hiring unsuitable workers. Pro-cyclical acceptance rates drive a wedge between meeting and hiring rates, explaining fluctuations in matching ...
Staff Reports , Paper 878

Discussion Paper
Revisiting the Case for International Policy Coordination

Prompted by the U.S. financial crisis and subsequent global recession, policymakers in advanced economies slashed interest rates dramatically, hitting the zero lower bound (ZLB), and then implemented unconventional policies such as large-scale asset purchases. In emerging economies, however, the policy response was more subdued since they were less affected by the financial crisis. As a result, capital flows from advanced to emerging economies increased markedly in response to widening interest rate differentials. Some emerging economies reacted by adopting measures to slow down capital ...
Liberty Street Economics , Paper 20160601

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