A simple and effective misspecification test for the double-hurdle model

The commonly-used version of the double-hurdle model rests on a rather restrictive set of statistical assumptions, which are very seldom tested by practitioners, mainly because of the lack of a standard procedure for doing so, although violation of such assumptions can lead to serious modelling flaws. We propose here a bootstrap-corrected conditional moment portmanteau test which is simple to implement and has good size and power properties.     

Testing for cointegration using the Johansen methodology when variables are near-integrated: size distortions and partial remedies

We investigate the properties of Johansen’s (J Econ Dyn Control 12:231–254, 1988; Econometrica 59:1551–1580, 1991) maximum eigenvalue and trace tests for cointegration under the empirically relevant situation of near-integrated variables. Using Monte Carlo techniques, we show that in a system with near-integrated variables, the probability of reaching an erroneous conclusion regarding the cointegrating rank of the system is generally substantially higher than the nominal size. The risk of concluding that completely unrelated series are cointegrated is therefore non-negligible. We suggest ways of identifying the problem and different approaches to reduce the size distortions of the tests.     

A note on the Wald,LR and LM tests and misspecification

In this note, we investigate sensitivity of the Wald, LR and LM tests to specification error. It is shown that these three tests are very sensitive to specification error, but the LM test is relatively superior to other two tests under certain situations.     

Interactions between real economic and financial sides of the US economy in a regime-switching environment

This objective of this study is to examine the linkages between real (economic) and financial variables in the United States in a regime-switching environment that accounts explicitly for high volatility in the stock market and high stress in financial markets. Since the linearity test shows that the linear model should be rejected, we employ the Markov-switching VECM to examine the same objective using the Bayesian Markov-chain Monte Carlo method. The regime-dependent impulse response function (RDIRF) highlights the increasing importance of the financial sector of the economy during stress periods. The responses and their fluctuations are significantly greater in the high-volatility regime than in the low-volatility regime.     

The impacts of regime-switching structures and fat-tailed characteristics on the relationship between inflation and inflation uncertainty

A great of deal of study has explored the relationship between inflation and inflation uncertainty under the assumptions of normal distribution and no regime shift. This paper attempts to investigate whether changes in the specification of distribution specification and regime shifts will affect the inflation-uncertainty relationship. Empirical results show that these two factors have a vital effect on the inflation-uncertainty relationship. A specification with four states and the Student’s t distributed error terms can successfully describe the dynamics of the inflation rate. After taking the non-normal density and independent regime shifts into account, this paper finds that inflation uncertainty has no impact on inflation, regardless of inflation pressure. Inflation has a negative impact on inflation uncertainty during periods of high inflation volatility, while the impact of inflation on inflation uncertainty is insignificant during periods of low inflation volatility.     

Dummy variables and predictive tests for structural change

We propose a dummy variable interpretation and an alternative proof of the predictive Chow test; we further show that it provides useful additional information on structural changes. We apply this approach to the St. Louis equation.     

Real interest rates,inflation and the open economy: A regime-switching perspective on Australia and New Zealand

We investigate the time-series properties of Australian and New Zealand real interest rates within a Markov-switching framework. This enables us to identify characteristics in real interest rate behavior hitherto unacknowledged. We find that rates switch between alternative stationary regimes characterized by differing means, speeds of mean-reversion and volatility. For New Zealand, high rates of inflation increase the probability of remaining in a regime characterized by a faster speed of adjustment. Further application of this methodology considers the real interest rate differential between Australia and New Zealand and points to differing regimes based on volatility rather than persistence.     

Iterative algorithm for non parametric estimation of the instrumental variables quantiles

This paper proposes a simple algorithm for the numerical computation of the non parametric IV quantile estimation. This algorithm is based on the Landweber iterations for solving a nonlinear integral equation. The paper is illustrated by numerical simulations.     

政府机构改革与编制立法

目前福建省省级党政机构改革“三定”工作基本完成,市县乡机构改革即将启动。这次机构改革的目标是:建立办事高效、运转协调、行为规范的行政管理体系,完善国家公务员制度,建立高素质的专业化行政管理干部队伍,逐步建立适应社会主义市场经济体制的有中国特色的地方行政管理体制。20年改革实践证明,为保证和促进机构编制管理工作的正     

Testing the validity of PPP theory for African countries

This study examines the purchasing power parity theory for 14 African countries by applying a recent composite time series method that incorporates the Fourier approximation. The structural breaks are modelled as a gradual smooth process by means of a Fourier component. The Fourier unit root test failed to find any evidence showing that real exchange rates for these 14 countries have mean-reverting tendencies. However, both cointegration and Fourier cointegration tests detect a stable long-term relation between the nominal exchange rate and relative price levels for 8 out of 14 countries; moreover, for five countries Fourier component in cointegration analysis is found to suit quite well.     

Testing for Granger non-causality using the autoregressive metric

A new non-causality test based on the notion of distance between ARMA models is proposed in this paper. The advantage of this test is that it can be used in possible integrated and cointegrated systems, without pre-testing for unit roots and cointegration. The Monte Carlo experiments indicate that the proposed method performs reasonably well in finite samples. The empirical relevance of the test is illustrated via an application.     

Decision theory made relevant: Between the software and the shrink

Decision theory offers a formal approach to decision making, which is often viewed and taught as the rational way to approach managerial decisions. Half a century ago it generated high hopes of capturing and perhaps replacing intuition, and providing the “right” answer in practically all managerial situations. Today it seems fair to say that decision theory has not lived up to these expectations. Behavioral science provides ample evidence that managers fail to follow the dicta of decision theory, even when these are explained to them. As a result, executives often find decision theory frustrating and useless and prefer to rely on their intuition. This paper suggests that this extreme conclusion is unwarranted and calls for a re-appraisal of decision theory. We propose that it should not always be regarded as a mathematical tool that produces the answer; rather, it can be viewed as a framework for a dialog between the decision maker and the decision theorist. In one extreme, the decision theorist studies the problem and provides the “correct’’ answer. But in another, the decision theorist only challenges the decision maker's intuition and logic. In between, a whole gamut of possible dialogs exists, in which decision theory doesn't replace intuition, but supports and refines it.     

Testing for asymmetries in the preferences of the euro-area monetary policymaker

This article tests for asymmetries in the preferences of the euro-area monetary policymaker with 1995:1–2005:2 data from the latest update of the European Central Bank's (ECB's) Area-wide database. Following the relevant literature, we distinguish between three types of asymmetry: precautionary demand for expansions, precautionary demand for price stability and interest rate smoothing asymmetry. Based on the joint generalized method of moments (GMM) estimation of the Euler equation of optimal policy and the aggregate supply-aggregate demand (AS-AD) structure of the macroeconomy, we find evidence of precautionary demand for price stability in the preferences revealed by the monetary policymaker. This type of asymmetry is consistent with the ECB's definition of price stability and with the priority of credibility-building by a recently created monetary authority.     

市场整合研究方法与传达的信息

本文从认识市场结构和运作效率的角度，分析和比较了近年市场整合研究文献中使用较多的两种方法——协整检验和状态转换模型，对市场的“完全整合”、“不完全整合”和“市场隔离”三种状况进行理论界定，并在此基础上系统比较两种方法在提供关于市场状况信息方面的功能。本文认为单纯的“价格整合”既不是“市场整合”的必要条件也非充分条件；状态转换模型有着全面考查市场效率所需的价格、交易成本和贸易量三方面信息的能力，但它在了解市场之间的相互影响及其调整过程等动态分析方面尚有一定局限。     

Testing for rationality: the case of discrete choice data

When working with micro data on consumer demand, there are many different situations where decisions involve only discrete choices. In this context, conditions under which an underlying rational preference structure exists are derived. Moreover, by introducing flexibility into the model, it is possible to identify nonrational behavior in the sample.     

Testing for the Presence of a Tremble in Economic Experiments

The classical trinity of tests is used to check for the presence of a tremble in economic experiments in which the response variable is binary. A tremble is said to occur when an agent makes a decision completely at random, without regard to the values taken by the explanatory variables. The properties of the tests are discussed, and an extension of the methodology is used to test for the presence of a tremble in binary panel data from a well-known economic experiment.     

Testing for Equilibrium in the Australian Wage Equation*

In this paper a range of unit root and cointegration tests are applied to the time-series variables most commonly found in the various specifications of the Australian wage equation. We find a contradiction between the standard Dickey-Fuller (DF) tests and the results from Johansen estimation regarding the order of integration. The conclusion we reach using tests developed by Perron (1989,1990) is that all the variables are trend stationary processes and that the cointegration framework is inappropriate in this case.     

Boundedness of economic variables and Olech's theorem

On the basis of Olech's theorem we derive conditions on which any solution path starting from an arbitrary initial point in a two-dimensional bounded region ultimately converges to a unique equilibrium point without escaping from the region during a transition period. Then, using the result, we render one proposition more exact from the economic point of view.I would like to thank two anonymous referees for valuable comments and advices. Remaining errors are, of course, wholly due to myself.     

Viewpoint: An extended class of instrumental variables for the estimation of causal effects

Abstract We examine how structural systems can yield observed variables instrumental in identifying and estimating causal effects. We provide an exhaustive characterization of potentially identifying conditional exogeneity relationships and demonstrate how structural relations determine exogeneity and exclusion restrictions that yield moment conditions supporting identification. This provides a comprehensive framework for constructing instruments and covariates. We introduce notions of conditioning and conditional extended instrumental variables (XIVs). These permit identification but need not be traditional instruments, as they may be endogenous. We distinguish between observed XIVs and proxies for unobserved XIVs. A main message is the importance of sufficiently specifying causal relations governing the unobservables.