New Keynesian Model Research Articles

Is the slope of the euro area Phillips curve steeper than it seems? Heterogeneity and identification

Heterogeneity in Phillips Curve slopes among members of a monetary union can lead to biased to estimates of the union-wide ‘average’ slope in reduced form regressions. The intuition is that in a monetary union with heterogeneous regional Phillips curve slopes, the central bank, aiming at stabilizing demand shocks, will react stronger to shocks in regions with steep slopes compared to shocks in regions with flat slopes. Using a simple New-Keynesian model of a monetary union we show that when failing to account for this heterogeneity in the estimation, reduced form estimates of the union-wide ‘average’ slope suffer from a sizable bias. Empirically, we show that a similar bias exists in EMU data and slope estimates that adequately control for slope heterogeneity are steeper than those from reduced form OLS regressions.

Informality, rule-of-thumb consumers, and the effectiveness of monetary policy in emerging economies

This paper investigates how the presence of a large fraction of rule-of-thumb consumers and an informal sector and (henceforth, informality) impact on the effectiveness of monetary policy in developing/emerging economies. We develop a small open economy New-Keynesian model, which is estimated using data on selected Sub-Saharan African countries where the coexistence of these two frictions is widespread - Burundi, Malawi and Rwanda. The results reveal that (i) rule-of-thumb consumption enhances the dominance of demand shocks and makes inflation stabilization a challenge; (ii) the presence of an informal sector causes supply shocks to be dominant, creating a trade-off between stabilizing inflation and output; (iii) rule-of-thumb consumption weakens the transmission mechanism of monetary policy while its interaction with informality worsens the situation in most of the selected countries; (iv) informality amid a large population of rule-of-thumb consumers causes the nominal interest rate to counterintuitively decline in response to a contractionary monetary policy shock; (v) in some of the selected countries, a positive productivity shock counterintuitively triggers a nominal exchange rate appreciation when informality interacts with rule-of-thumb consumption behavior; (vi) the coexistence of informality and rule-of-thumb consumption behavior amplifies country-risk premium shocks and; (vii) rule-of-thumb consumption behavior is welfare enhancing. These findings are informative to policymakers, particularly in emerging economies, on the priority reforms as they transition to inflation targeting frameworks. Direct policy implications emerge regarding financial inclusion, the size of the informal sector, and farm input subsidy programs.

Trend inflation and exchange rate dynamics: A new Keynesian approach

This study examines the exchange rate implications of trend inflation within a two-country New Keynesian (NK) model. An NK Phillips curve generalized by trend inflation makes the inflation differential smoother, more persistent, and less sensitive to the real exchange rate. A Bayesian analysis with post-Bretton Woods data for Canada and the U.S. shows that the model's equilibrium, which relies on Taylor rules with a persistent trend inflation shock and strong policy inertia, mimics empirical regularities in exchange rates that are difficult to reconcile within a standard NK model. Trend inflation helps explain the empirical puzzles of the exchange rate dynamics.

Monetary Policy and Heterogeneity: An Analytical Framework

Abstract THANK is a tractable heterogeneous-agent New-Keynesian model that captures analytically core micro-heterogeneity channels of quantitative-HANK: cyclical inequality and risk; self-insurance, precautionary saving, and realistic intertemporal marginal propensities to consume. I use it to elucidate key transmission mechanisms and dynamic properties of HANK models. Countercyclical inequality yields aggregate-demand amplification and makes determinacy with Taylor rules more stringent; but solving the forward guidance puzzle requires procyclical inequality: a Catch-22. Solutions include combining inequality with a distinct risk channel, with compensating cyclicalities; I provide evidence that disposable income inequality was procyclical in the last two, Great and COVID recessions, while risk is countercyclical. Alternative policy rules also solve the Catch-22, e.g. price-level-targeting or, in the model version with liquidity, setting nominal public debt. Optimal policy with heterogeneity features a novel inequality-stabilization motive generating higher inflation volatility—but is unaffected by risk, insofar as the target efficient equilibrium entails no inequality.

Transmission mechanisms in HANK: An application to Chile

Households in emerging economies are subject to significant income risk and have low access to financial markets. Leveraging multiple administrative microdata sources, this paper documents significant heterogeneity in asset holdings, income, and income cyclicality across the distribution of Chilean households, as well as considerable income risk. Considering this evidence, we compare the transmission mechanisms between Heterogeneous-Agent New-Keynesian models with search and matching (SAM) and sticky wage frictions (SW), and between one-liquid-asset (OA) and two-asset (TA) specifications. We propose a decomposition of consumption responses into direct, indirect, average, and cross-sectional effects. We show that the transmission mechanisms depend on the labor market setup: in SAM-OA the transmission operates through average and direct effects, while in SW-OA it is through cross-sectional effects. Assets also matter, the transmission in the SW-TA has stronger direct and average effects than SW-OA.

Public expenditure multipliers and informality

This paper investigates the role of informality in affecting the magnitude of the public expenditure multiplier in a panel of 142 countries, using the local projections method. We find a strong negative relationship between the degree of informality and the size of the multiplier. This result holds irrespective of the level of economic development and institutional quality and is robust to additional country characteristics such as trade and financial openness and exchange rate regime. In a two-sector New-Keynesian model, we rationalize this result by showing that fiscal shocks raise the relative price of official goods, thereby shifting demand towards the informal sector. This reallocation effect increases with the level of informality, because a larger informal sector is associated with a stronger appreciation of relative prices in response to fiscal shocks, and thus reduces the multiplier.

Household heterogeneity and the price puzzle in a new Keynesian model

This paper provides a new insight into the price puzzle using a new Keynesian (NK) model with household heterogeneity. To do this, we adopt a tractable heterogeneous-agent NK (THANK) model that nests the two-agent NK (TANK) and representative-agent NK models. We first demonstrate that when the share of liquidity-constrained (LC) consumers is high, the degree of inflation stabilization in the Taylor rule crucially affects whether the price puzzle occurs in the TANK model. Second, we show that regardless of the share of LC consumers, the price puzzle disappears in the THANK model with a discounted dynamic IS (DIS) curve. In contrast, for a compounded DIS curve, a higher share of LC consumers generates the price puzzle. Finally, we find that even in the case of a compounded DIS curve, reinforced interest rate smoothing can prevent the price puzzle.

Does “Lean Against the Wind” monetary policy improve welfare in a commodity exporter?

Emerging Market Economies struggle to balance monetary policy with capital flow management and commodity price volatility. Our study employs a New-Keynesian model, using Russian data from 2001 to 2019, to examine ‘Lean Against the Wind’ (LAW) monetary policies. We show that under Lean Against the Wind (LAW) policies, households with borrowed funds experience improved welfare, while households that save are adversely affected. While LAW increases output and inflation volatility, it also presents mixed financial stability outcomes—lowering debt volatility but heightening that for household delinquencies. These findings highlight the complex effects of LAW in economies subject to varied shocks.

Foreign Exchange Interventions in the New-Keynesian Model: Transmission, Policy, and Welfare

Foreign Exchange Interventions in the New-Keynesian Model: Transmission, Policy, and Welfare

Endogenous Uncertainty and Credit Crunches

Abstract We develop a theory of endogenous uncertainty in which the ability of investors to learn about firm-level fundamentals is impaired during financial crises. At the same time, higher uncertainty reinforces financial distress. Through this two-way feedback loop, a temporary financial shock can cause a persistent reduction in risky lending, output, and employment that coincides with increased uncertainty, default rates, credit spreads, and disagreement among forecasters. We embed our mechanism into standard real business cycle and New-Keynesian models and show how it generates endogenous and internally persistent processes for the efficiency and labour wedges.

Endogenous Labor Supply in an Estimated New-Keynesian Model: Nominal versus Real Rigidities

The deep deterioration in the labor market during the Great Recession, the subsequent slow recovery, and the missing disinflation are hard to reconcile for standard macroeconomic models. We develop and estimate a New-Keynesian model with financial frictions, search and matching frictions in the labor market, and endogenous intensive and extensive labor supply decisions. We conclude that the estimated combination of the low degree of nominal wage rigidities and high degree of real wage rigidities, together with the small role of pre-match costs relative to post-match costs, are key in successfully forecasting the slow recovery in unemployment and the missing disinflation in the aftermath of the Great Recession. We find that endogenous labor supply data are very informative about the relative degree of nominal and real wage rigidities and the slope of the Phillips curve. We also find that none of the model-based labor market gaps are a sufficient statistic of labor market slack, but all contain relevant information about the state of the economy summarized in a new indicator for labor market slack we put forward.

Unintended Consequences of Central Bank Lending in Financial Crises

Abstract I investigate the macroeconomic impact of central bank funding becoming a more attractive funding source to financial intermediaries in times of crisis. I show that the requirement to pledge collateral has a contractionary effect on private credit, everything else equal, and thereby reduces the expansionary effect that such lending otherwise has. I use an estimated New Keynesian model with financial frictions to show that the collateral effect explains the limited growth of Italian banks’ private credit in response to the European Central Bank’s three-year longer-term refinancing operations. Finally, I explore whether changes in lending policy can offset the cumulative negative effects from the collateral effect.

Real exchange rate dynamics in the New-Keynesian model

Real exchange rate dynamics in the New-Keynesian model

Price setting frequency and the Phillips curve

We develop a New Keynesian (NK) model with endogenous price setting frequency. Whether a firm updates its price is a discrete choice: when expected benefits outweigh expected costs, prices are reset optimally. The model gives rise to a non-linear Phillips curve as prices are more flexible during demand-driven expansions and less so during demand-driven recessions. Monetary policy can have substantial real effects despite the model having a state-dependent pricing component. Our quantitative analysis shows that contrary to the standard NK model, the assumed price setting behavior: (i) is consistent with micro data on price setting frequency; (ii) generates a direct effect of the time-varying price setting frequency on inflation; (iii) creates time-variation in the Phillips curve slope that explains shifts in the Phillips curve associated with different historical episodes; (iv) explains inflation dynamics without relying on implausible high cost-push shocks and nominal rigidities inconsistent with micro data; (v) reconciles the NK model with observed inflation moments.

Oil uncertainty and the price-cost markup: Evidence from U.S. data

This paper investigates the implications of uncertainty in the oil and gas sector for the dynamics of the price-cost markup at the business cycle frequency. We estimate a structural VAR model using U.S. quarterly data for the period 1982q2:2018q4, and find that an increase in oil uncertainty reduces the measured price-cost markup and economic activities. This result is consistent with the prediction of a calibrated New-Keynesian model with oil uncertainty shocks. These findings also provide insights into the relevance of the markup as a transmission channel of oil uncertainty.

Evaluation and indirect inference estimation of inattentive features in a New Keynesian framework

AbstractWe test the standard New Keynesian (NK) dynamic stochastic general equilibrium (DSGE) model with and without inattentiveness features, where inattentiveness is modeled either in the form of sticky information (SI) or imperfect information (IF) data revision. All models are estimated and tested by indirect inference. The estimated model with sticky information somewhat outperformed the estimated NK model with full‐information rational expectation (FIRE), though both passed the test easily, while the model with IF data revision was strongly rejected.

The liquidity channel of fiscal policy

Expansionary fiscal policy lowers the return difference between public debt and less liquid assets—the liquidity premium. We rationalize this finding in an estimated heterogeneous-agent New-Keynesian model with incomplete markets and portfolio choice, in which public debt affects private liquidity. This liquidity channel stabilizes fixed-capital investment. We then quantify the long-run effects of higher public debt and find little crowding out of capital, but a sizable decline of the liquidity premium, which increases the fiscal burden of debt. The revenue-maximizing level of public debt is positive and has increased to 60 percent of US GDP post-2010.

Endogenous Technological Change and the New Keynesian Model

Abstract This paper develops and estimates a New Keynesian (NK) model with endogenous technology. It shows that introducing endogenous technology can solve three important puzzles that conventional NK models face: the inflation persistence, disinflationary news shock, and zero lower bound (ZLB) supply shock. First, the observed persistence in inflation is explained without relying on the conventional NK models' additional assumptions (e.g., backward price indexation). Second, it explains the observed disinflationary effect of a news shock. Third, the model avoids the conventional NK models' paradoxical, empirically inconsistent prediction that a negative supply shock is expansionary at the ZLB on interest rates.

Short-Term Planning, Monetary Policy, and Macroeconomic Persistence

We estimate a behavioral New Keynesian (NK) model in which households and firms plan over a finite horizon. The finite-horizon planning (FHP) model outperforms rational expectations versions of the NK model as well as other behavioral NK models. In the FHP model, households and firms are forward-looking in thinking about events over their planning horizon but are backward-looking regarding events beyond that point. This gives rise to substantial aggregate persistence without resorting to additional features such as habit persistence and price contracts indexed to lagged inflation. (JEL E12, E23, E31, E32, E52)

Monetary policy and speculative asset markets

I study monetary policy in an estimated financial New-Keynesian model extended by behavioral expectation formation in the asset market. Credit frictions create a feedback between asset markets and the macroeconomy, and behaviorally motivated speculation can amplify fundamental swings in asset prices, that potentially cause endogenous, nonfundamental bubbles and bursts. Booms in asset prices improve firms financing conditions and are therefore deflationary. These features significantly improve the power of the model to replicate empirical key moments. A monetary policy that targets asset prices can dampen financial cycles and reduce volatility in asset markets (dampening effect). This comes at the cost of creating an additional channel through which asset price fluctuations transmit to macroeconomic fundamentals (spillover effect). I find that unless financial markets are severely overheated, the undesirable fluctuations in inflation and output caused by the spillover effect more than outweigh the benefits of the dampening effect.