Abstract
This paper utilizes panel VAR analysis to investigate the relationship between the sentiment of Japanese citizens toward their trading partners and the flow of trade. Using a system GMM approach, short- and long-run restrictions are applied in a panel VAR setting for the first time to identify structural shocks to sentiment, imports, exports, and the exchange rate. Results show that people's collective psychological workings and trade patterns are interrelated. Evidence of a strong asymmetric relationship between imports and sentiment is found: increases in sentiment lead to higher imports, but a positive shock to imports causes significant drops in sentiment.
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Notes
The data can be found at the website: http://www8.cao.go.jp/survey/index-gai.html. The data are available from the authors upon request.
Data were also deflated by the US CPI, following other work in the literature. All results are similar and are available from the authors upon request.
Panel VAR estimation was performed in RATS 8.0.
For more information on specific requirements for identifying restrictions in structural VAR models, see Rubio-Ramirez et al. [2010].
The Maddala and Wu [1999] test is a non-parametric panel unit root test. The Pesaran and Maddalu and Wu tests were performed in MATLAB using the code provided on Christopher Hurlin's web page, http://www.univ-orleans.fr/deg/masters/ESA/CH/churlin_R.htm. The other tests were run in Stata.
The Pedroni tests were conducted in RATS and the Westerlund tests were conducted in Stata.
All estimates discussed in this section are similar if Russia is included in the panel VAR, except that estimated standard errors are significantly larger.
Japan has no formal Economic Partnership Agreements (EPA) with the countries in the sample and, as such, no policy variables are added to the VAR to capture this potential effect. Japan has been one of the slowest among developed countries to develop such EPAs largely due to its agricultural policies.
The sum of the variance decompositions does not necessarily sum to 100 as the median figure from the 1,000 bootstrap samples at each horizon is reported in the table.
References
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APPENDIX
APPENDIX
Hurlin panel granger causality test statistics
In the case of exchange rates granger causing imports, the Hurlin test is based on the following panel regression with stationary variables:
where θ i =(θ ii (1), …, θ ii (K)). Individual effects α i are assumed to be fixed, and the lag orders, K, are also assumed to be identical across the panel (two lags are used in the paper). Additionally, the autoregressive coefficients, γ i (k), and the regression coefficients, θ i (k), vary across panels. The null hypothesis is: H0: θ i =0, ∀i=1, …, N, and the alternative hypothesis is: H1: θ i =0, ∀i=1, …, N1 and θ i ≠0, ∀i=N1+1, N2+1, …, N, where N1 is unknown but satisfies 0⩽N1/N<1. N=4 in Table 2.
The test statistics is simply the average of individual Wald statistics from the individual country granger causality test for i=1, …, N. Let W N,T Hnc be the average of the test statistics. Then,
where W i,T denotes the individual Wald statistics from the individual country granger causality test. Hurlin [2007] showed that this statistic converges to a chi-squared distribution with K degrees of freedom. Moreover, W N,T Hnc converges toward a normal distribution when T goes to infinity and N goes to infinity. Specifically, let Z N,T Hnc be the corresponding standardized statistic:
Then, . Furthermore, Hurlin [2007] also proposed that for a small sample, T, the following approximated standard statistic, denoted by Ẑ N,T Hnc, follows approximately the same distribution as the standardized average Wald statistics Z N,T Hnc. Ẑ N,T Hnc , where Ẑ N,T Hnc takes the following form:
Table 2 examines panel granger causality for all possible combinations of the four panel variables sentiment, imports, exports, and exchange rates using statistics created for (A2)–(A4).