Trend shocks and the countercyclical U.S. current account

From 1960 to 2009, the U.S. current account balance has tended to decline during expansions and improve in recessions. We argue that shocks to the trend growth rate of productivity can help explain the countercyclical U.S. current account. Our framework is a two‐country, two‐good business cycle model in which international asset trade is limited to a single, non‐contingent bond. We identify trend and transitory shocks to U.S. productivity using generalized method of moments (GMM) estimation. The specification that best matches the data assigns a large role to trend shocks. The estimated model also captures key facts regarding international co‐movement.     

International Risk Sharing and the Transmission of Productivity Shocks

This paper shows that standard international business cycle models can be reconciled with the empirical evidence on the lack of consumption risk sharing. First, we show analytically that with incomplete asset markets productivity disturbances can have large uninsurable effects on wealth, depending on the value of the trade elasticity and shock persistence. Second, we investigate these findings quantitatively in a model calibrated to the U.S. economy. With the low trade elasticity estimated via a method of moments procedure, the consumption risk of productivity shocks is magnified by high terms of trade and real exchange rate (RER) volatility. Strong wealth effects in response to shocks raise the demand for domestic goods above supply, crowding out external demand and appreciating the terms of trade and the RER. Building upon the literature on incomplete markets, we then show that similar results are obtained when productivity shocks are nearly permanent, provided the trade elasticity is set equal to the high values consistent with micro-estimates. Under both approaches the model accounts for the low and negative correlation between the RER and relative (domestic to foreign) consumption in the data—the "Backus–Smith puzzle".     

The global effects of productivity gains in Asian emerging economies

This paper investigates international responses of key macroeconomic variables to simultaneous shocks to productivity in the traded sector in eight Asian emerging and developing countries. We use panel estimation techniques to construct component sub-models in a thirty country global vector autoregressive (GVAR) model. We identify the shocks by using sign restricted impulse responses. We find that increases in traded-sector productivity in Asian emerging and developing countries have a positive effect on economic growth and international trade for most countries.     

R&D Policies and Endogenous Growth: A Dynamic General Equilibrium Analysis of the Case for Canada*

This paper utilizes a general equilibrium R&D model of endogenous growth via increasing capital variety to examine the impact of alternative policies on productivity and economic growth. The model is calibrated using data from the Canadian economy. Findings reveal that direct incentives such as subsidies to R&D activities would have the highest productivity impact on the Canadian economy, that an increase in subsidies to the users of R&D capital (output) would have a positive but smaller impact, and trade liberalization would have minimal effects on productivity growth via its impact on international R&D spillovers.     

Productivity differences and inter-state migration in the U.S.: A multilateral gravity approach

In this paper, we study the quantitative role of productivity differences in explaining migration in presence of multiple destination choices. We construct a dynamic general equilibrium model with multi-region, multi-sector set-up where labor is a mobile input, which adjusts to regional and sectoral productivity shocks, resulting in migration across regions. The proposed model generates a migration network where the flow of migrants between any two regions follows a gravity equation. We calibrate the model to the U.S. data and we find that variation in industrial and regional total factor productivity shocks explains about 63% of the interstate migration in the U.S. Finally, we perform comparative statics to estimate the effects of long-run structural changes on migration. We find that capital intensity of the production process and the demand for services over manufactured goods negatively impact aggregate level of migration whereas asymmetries in trade patterns do not appear to have substantial effects.     

Productivity Shocks and Monetary Policy in a Two-Country Model

In this paper, we examine the effects of foreign productivity shocks on monetary policy in a symmetric open economy. Our two-country model incorporates the New Keynesian features of price stickiness and monopolistic competition based on the cost channel of Ravenna and Walsh (2006). In particular, in response to asymmetric productivity shocks, firms in one country achieve a more efficient level of production than those in another economy. Because the terms of trade are directly affected by changes in both economies’ output levels, international trade creates a transmission channel for inflation dynamics in which a deflationary spiral in foreign producer prices reduces domestic output. When there is a decline in economic activity, the monetary authority should react to this adverse situation by lowering the key interest rate. The impulse response function from the model shows that a productivity shock can cause a real depreciation of the exchange rate when economies are closely integrated through international trade.     

Optimal Monetary Policy with Vertical Production and Trade*

This paper explores the optimal monetary policy response to domestic and foreign technology shocks in an open economy with vertical structure of production and trade. We find that any stage‐specific productivity shock in one country may have a transborder spillover effect on the other country via the vertical trade. So when choosing optimal monetary rules, each monetary authority should respond to both home and foreign productivity shocks. Also, the flexible exchange rate cannot replicate the flexible price equilibrium, even under producer currency pricing, due to price stickiness in multiple stages. We also find that the existence of a transborder spillover effect depends on the currencies of price setting. Finally, vertical trade may affect the value of exchange rate flexibility under PCP and LCP setting.     

The Great Depression in Italy: Trade Restrictions and Real Wage Rigidities

In Italy, as in many other countries, the years immediately after 1929 were characterized by a major slowdown in economic activity. We argue that the depth and duration of the crisis cannot be explained solely by productivity shocks. We present a model in which trade restrictions together with wage rigidities produce a significant slowdown in economic activity. The model is also consistent with evidence from sectoral disaggregated data. Our model predicts that trade restrictions can account for about one-half of the slowdown observed in the data while real wage rigidities can account for one-fourth of it. Journal of Economic Literature Classification Numbers: E30, F40, N24.     

Monetary policy and noise traders: A welfare analysis

This paper studies the choice of monetary policy regime in a small open economy with noise traders in forex markets. We focus on two simple rules: fixed exchange rates and inflation targeting. We contrast the above two rules against optimal policy with commitment under productivity shocks. In general, the presence of noise traders increases the desirability of a fixed exchange rate regime. We also evaluate the welfare impact of Tobin taxes in this milieu. These taxes help unambiguously in the absence of productivity shocks; their welfare impact under productivity shocks depends on the monetary regime in place and trade elasticity between domestic and foreign goods.     

Oil and US stock market shocks: Implications for Canadian equities

Oil and US stock market shocks are relevant to Canadian equities because Canada is an oil exporter exposed to market developments in the wider continent. We evaluate how the relationship between Canadian stock market indices and such external shocks change under extraordinary events. To do this, we subject statistically identified oil and S&P 500 market shocks to a surprise filter, which detects shocks with the greatest magnitude occurring over a given lookback period, and an outlier filter, which detects extrema shocks that exceed a normal range. Then, we examine how the dependence structure between shocks and Canadian equities change under the extreme surprise and outlier episodes through various co-moment spillover tests. Our results show co-moments beyond correlation are important in reflecting the changes occurring in the relationships between external shocks and Canadian equities in extreme events. Additionally, the differences in findings under extreme positive and negative shocks provide evidence for asymmetric spillover effects from the oil and US stock markets to Canadian equities. Moreover, the observed heterogeneity in the relationships between disaggregated Canadian equities and shocks in the crude oil and S&P 500 markets are useful to policy-makers for revealing sector-specific vulnerabilities and provide portfolio diversification opportunities for investors to exploit.     

What Determines Real Exchange Rates? The Nordic Countries

The model derived in this paper yields testable implications concerning the long‐run co‐movements of real exchange rates, relative labor productivity, the trade balance and terms of trade. Countries with relatively higher output growth, trade deficits or improved terms of trade are found to have more appreciated real exchange rates, with the main channel of transmission working through the relative price of nontraded goods. Exogenous terms‐of‐trade shocks are found to be the most important determinant of long‐run movements in the real exchange rate for Denmark and Norway, while demand shocks account for most of the long‐run variance in the real exchange rate for Finland and Sweden.     

Sources of Business Cycles in a Low Income Country

We examine the role of global and domestic shocks in driving macroeconomic fluctuations for Ghana. We are able to study the impact of exogenous shocks, including productivity, credit supply and commodity price shocks. We identify the shocks using a combination of sign and recursive restrictions within Bayesian vector autoregressive models. As a benchmark we provide results for South Africa to document the difference between two economies with similar structures but at different stages of development. We find that global shocks play a more dominant role in South Africa than in Ghana. These shocks operate through three channels: trade, credit and commodity prices.     

Aggregate Fluctuations with National and International Returns to Scale*

Cyclical movements in aggregate output, factor inputs, and productivity are all positively correlated across countries. This article proposes a model in which positive cross‐country correlations of these variables result from increasing returns to the world‐wide variety of intermediate goods even if technology shocks are purely country‐specific. The model also accounts for the observed positive relationship between bilateral trade volume and international comovements. Positive comovements can also arise with constant returns to variety, but only if technology shocks are themselves strongly correlated. The combination of constant returns and common shocks, however, tends to generate procyclical fluctuations of the trade balance.     

International business cycles and the relative price of investment goods

Abstract Is the relative price of investment goods a good proxy for investment specific technology? We model this relative price in a flexible price international economy with two fundamental shocks, namely, the total factor productivity (TFP) shock and the investment‐specific technology (IST) shock. We show that the one‐to‐one correspondence between the IST shock and the relative price of investment goods breaks down in an international economy because of the short‐run correlation between the terms of trade and the relative price of investment goods. The data congruent negative correlation between the investment rate and the relative price of investment goods thus does not necessarily reflect decline in investment frictions (rise in IST), as suggested by many studies. A calibration experiment with the US data demonstrates that such an inverse relation between rate of investment and the relative price of investment goods basically reflects the positive effect of TFP on the terms of trade for a broad range of economies where the home bias in consumption exceeds investment and there is a sizable adjustment cost of investment.     

Can the baseline search and matching model quantitatively explain Okun’s law?

Okun’s Law is an empirically observed, negative relationship between changes in an economy’s unemployment rate and its growth rate of output. The baseline search and matching model with stochastic labour productivity fails to match the Okun’s coefficient, because it generates a too low unemployment volatility and a too high correlation between labour productivity and unemployment. The model is capable of matching the coefficient if it is extended with an addition of employment separation shocks plus a high calibrated value of nonmarket activities. This article also shows that changes in the stochastic properties of exogenous shocks could explain changes in the Okun’s coefficient in the Great Moderation (1984–2007).     

Sensitivity of Job Destruction to Vintage and Tenure Effects

Matching models with endogenous job destruction typically deliver excessively volatile job destruction and moderate volatility of vacancies. In our model, vintage and tenure effects promote the creation of new matches that are temporarily more productive, while reducing the survival of temporarily less productive matches. This cleansing effect produces a counter‐cyclical inflow into unemployment, removes the strong response of job destruction to productivity shocks, and generates a downward‐sloping Beveridge curve, as in the data. The model also generates more volatility in vacancies, the job‐finding rate, and labor‐market tightness.     

Why have business cycle fluctuations become less volatile?

This paper shows that a standard Real Business Cycle model driven by productivity shocks can successfully account for the 50% decline in cyclical volatility of output, its components, and labor input that has occurred since 1983. The model is successful because the volatility of productivity shocks has also declined significantly over the same time period. We then investigate whether the decline in the volatility of the Solow Residual is due to changes in the volatility of some other shock operating through a channel that is absent in the standard model. We therefore develop a model with variable capacity and labor utilization. We investigate whether government spending shocks, shocks that affect the household’s first order condition for labor, and shocks that affect the household’s first order condition for saving can plausibly account for the change in TFP volatility and in the volatility of output, its components, and labor. We find that none of these shocks are able to do this. This suggests that successfully accounting for the post-1983 decline in business cycle volatility requires a change in the volatility of a productivity-like shock operating within a standard growth model. We thank Stephen Parente, Ed Prescott, John Taylor, and two anonymous referees for helpful comments and suggestions.     

Macroeconomic Interdependence with Trade and Multinational Activities

This paper examines how differences in the integration strategies followed by firms active in foreign markets affect the way productivity and policy shocks spread their effects worldwide. The analysis incorporates costly trade and local sales by multinational firms in a general-equilibrium open economy macroeconomic model. The mode of foreign market access is found to play a major role in the international business cycle, affecting the dimension of consumption and output spillovers worldwide. We show that despite financial markets being effectively complete, consumption risks may not be fully insured in the world economy as long as multinational firms discriminate prices across markets. Furthermore, cross-country differences in firms' integration strategies can account for extensive asymmetries in the way country-specific and global shocks are transmitted in the world economy. We argue that this may have relevant consequences for the welfare implications of monetary and trade policies.     

Politico-economic inequality and the comovement of government purchases

This paper explores the implications of economic and political inequality for the comovement of government purchases with macroeconomic fluctuations. We set up and compute a heterogeneous-agent neoclassical growth model, where households value government purchases which are financed by income taxes. A key feature of the model is a wealth bias in the political aggregation process. When calibrated to U.S. wealth inequality and exposed to aggregate productivity shocks, such a model is able to generate weaker positive comovement of government purchases than models with no political wealth bias. The wealth bias that matches the cross-sectional campaign contribution distribution by income is consistent with the mild positive comovement of government purchases in the aggregate data. We thus provide an empirically relevant example where economic and political heterogeneity matter for aggregate dynamics.     

Stability of M2 money demand function in industrial countries

In this article, we set out a model of labour productivity which distinguishes between shocks which change productivity permanently and shocks which have transient affects on productivity. We show that this model is a type of unobserved components model – a random walk with drift plus noise model. The advantage of this approach is that it provides a coherent framework to identify the deterministic trend growth component and also the productivity enhancing (or technology related) stochastic components. The model is applied to aggregate labour productivity in Australia and the time series of technology shocks extracted is used to shed some light on the contributions of policy reforms to productivity.