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Journal Article
What Accounts for the Growing Divergence between Employment Measures?
Willis, Jonathan L.; Zha, Tao (2024-08-12)
Our analysis reveals a significant and persistent divergence between employment measures from the Current Employment Statistics (CES) and Current Population Survey (CPS). Adjusting for the net birth-death contribution of businesses only partially explains this gap. The remaining large discrepancy is likely due to an underestimation of population growth in the CPS, potentially linked to recent immigration fluctuations. This finding has substantial implications for understanding the current labor market: adjusted CPS data reveals a more robust labor market with healthy demand and rapid supply ...
Policy Hub , Volume 2024 , Issue 6 , Pages 17

Working Paper
Asymmetric expectation effects of regime shifts in monetary policy
Zha, Tao; Waggoner, Daniel F.; Liu, Zheng (2008)
This paper addresses two substantive issues: (1) Does the magnitude of the expectation effect of regime switching in monetary policy depend on a particular policy regime? (2) Under which regime is the expectation effect quantitatively important? Using two canonical DSGE models, we show that there exists asymmetry in the expectation effect across regimes. The expectation effect under the dovish policy regime is quantitatively more important than that under the hawkish regime. These results suggest that the possibility of regime shifts in monetary policy can have important effects on rational ...
Working Paper Series , Paper 2008-22

Journal Article
Assessing simple policy rules: A view from a complete macroeconomic model
Leeper, Eric M.; Zha, Tao (2001-10)
Monetary policy analysts looking for a model on which to base decisions may consider two popular approaches-the New Keynesian (NK) and the identified vector autoregression (VAR) approaches. Choosing between the two can be difficult: NK models are stylized and have simple rules while structural VAR models have complex dynamics and loose behavioral interpretations. ; The simpler NK models often produce stark conclusions. For example, NK analyses consistently find that the Federal Reserve's monetary policy has improved markedly in the past two decades compared with the 1960s and 1970s. In ...
Economic Review , Volume 86 , Issue Q4 , Pages 35-58

Working Paper
Learning, adaptive expectations, and technology shocks
Zha, Tao; Huang, Kevin X. D.; Liu, Zheng (2008)
This study explores the macroeconomic implications of adaptive expectations in a standard real business cycle model. When rational expectations are replaced by adaptive expectations, we show that the self-confirming equilibrium is the same as the steady state rational expectations equilibrium for all admissible parameters, but that dynamics around the steady state are substantially different between the two equilibria. The differences are driven mainly by the dampened wealth effect and the strengthened intertemporal substitution effect, not by the escapes emphasized by Williams (2003). As a ...
Working Paper Series , Paper 2008-18

Working Paper
Conditional forecasts in dynamic multivariate models
Zha, Tao; Waggoner, Daniel F. (1998)
In the existing literature, conditional forecasts in the vector autoregressive (VAR) framework have not been commonly presented with probability distributions or error bands. This paper develops Bayesian methods for computing such distributions or bands. It broadens the class of conditional forecasts to which the methods can be applied. The methods work for both structural and reduced-form VAR models and, in contrast to common practices, account for the parameter uncertainty in small samples. Empirical examples under the flat prior and under the reference prior of Sims and Zha (1998) are ...
FRB Atlanta Working Paper , Paper 98-22

Working Paper
Assessing simple policy rules: a view from a complete macro model
Zha, Tao; Leeper, Eric M. (2000)
We explore two popular approaches to empirical analysis of monetary policy: the New Keynesian and the identified vector autoregression approaches. Stylized models of private behavior coupled with simple rules describing policy behavior characterize New Keynesian work. Vector autoregressions consist of minimally identified dynamic descriptions of private behavior coupled with a detailed rule for policy behavior. The simplicity of New Keynesian models aids in communication but leaves the models? implications vulnerable. By relating the New Keynesian models to identified vector autoregressions, ...
FRB Atlanta Working Paper , Paper 2000-19

Working Paper
Assessing the macroeconomic impact of bank intermediation shocks: a structural approach
Zha, Tao; Chen, Kaiji (2015-08-01)
We take a structural approach to assessing the empirical importance of shocks to the supply of bank-intermediated credit in affecting macroeconomic fluctuations. First, we develop a theoretical model to show how credit supply shocks can be transmitted into disruptions in the production economy. Second, we use the unique micro-banking data to identify and support the model's key mechanism. Third, we find that the output effect of credit supply shocks is not only economically and statistically significant but also consistent with the vector autogression evidence. Our mode estimation indicates ...
FRB Atlanta Working Paper , Paper 2015-8

Working Paper
Bayesian methods for dynamic multivariate models
Zha, Tao; Sims, Christopher A. (1996)
If multivariate dynamic models are to be used to guide decision-making, it is important that it be possible to provide probability assessments of their results. Bayesian VAR models in the existing literature have not commonly (in fact, not at all as far as we know) been presented with error bands around forecasts or policy projections based on the posterior distribution. In this paper we show that it is possible to introduce prior information in both reduced form and structural VAR models without introducing substantial new computational burdens. With our approach, identified VAR analysis of ...
FRB Atlanta Working Paper , Paper 96-13

Working Paper
A Gibbs simulator for restricted VAR models
Zha, Tao; Waggoner, Daniel F. (2000)
Many economic applications call for simultaneous equations VAR modeling. We show that the existing importance sampler can be prohibitively inefficient for this type of models. We develop a Gibbs simulator that works for both simultaneous and recursive VAR models with a much broader range of linear restrictions than those in the existing literature. We show that the required computation is of an SUR type, and thus our method can be implemented cheaply even for large systems of multiple equations.
FRB Atlanta Working Paper , Paper 2000-3

Working Paper
A Theory of Housing Demand Shocks
Wang, Pengfei; Zha, Tao; Liu, Zheng (2019-03-01)
Aggregate housing demand shocks are an important source of house price fluctuations in the standard macroeconomic models, and through the collateral channel, they drive macroeconomic fluctuations. These reduced-form shocks, however, fail to generate a highly volatile price-to-rent ratio that comoves with the house price observed in the data (the ?price-rent puzzle?). We build a tractable heterogeneous-agent model that provides a microeconomic foundation for housing demand shocks. The model predicts that a credit supply shock can generate large comovements between the house price and the ...
FRB Atlanta Working Paper , Paper 2019-4

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