Shinichi Sakata

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In this paper, I examine the spatial correlation of wages and consumer purchasing power across U.S. counties to see whether regional product-market linkages contribute to spatial agglomeration. First, I estimate a simple market-potential function, which is a reduced form for several economic geography models. In this specification, proximity to consumer(More)
Yes. We construct a measure of aggregate technology change, controlling for imperfect competition, varying utilization of capital and labor, and aggregation effects. On impact, when technology improves, input use falls sharply, and output may fall slightly. With a lag of several years, inputs return to normal and output rises strongly. We discuss what(More)
This paper proposes a method to address the longstanding problem of lack of monotonicity in estimation of conditional and structural quantile functions, also known as the quantile crossing problem. The method consists in sorting or monotone rearranging the original estimated non-monotone curve into a monotone rearranged curve. We show that the rearranged(More)
In this paper, we show the first order validity of the block bootstrap in the context of Kolmogorov type conditional distribution tests when there is dynamic misspecification and parameter estimation error. Our approach differs from the literature to date because we construct a bootstrap statistic that allows for dynamic misspecification under both(More)
An important question in applied work is how to bootstrap autoregressive processes involving highly persistent time series of unknown order of integration. In this paper, we show that in many cases of interest in applied work the standard bootstrap algorithm for unrestricted autoregressions remains valid for processes with exact unit roots; no pre-tests are(More)
This paper focuses on standard error estimation in Fixed-Effects panel models if there is serial correlation in the error process. Applied researchers have often ignored the problem, probably because major statistical packages do not estimate robust standard errors in FE models. Not surprisingly, this can lead to severe bias in the standard error estimates,(More)
The paper examines the impact of the business cycle on enrollments and finances at individual community colleges between the late 1960’s and the mid 1980’s. We find that 1 percent increases in the unemployment rates of recent high school graduates and of all adults are associated with rises in full-time attendance of about 0.5 percent and 4 percent(More)
Brain-derived neurotrophic factor (BDNF) is a nerve growth factor that plays an important role in the development and maintenance of adult neurons and is important regulator of synaptic plasticity in human brain. It has been reported that there are alterations in BDNF levels in the brains of patients with schizophrenia. It has also been reported that(More)
This paper examines the effects of two faces of R&D (innovation and learning) and technology spillovers from FDI (foreign direct investment) on a Þrm’s productivity growth. Using Þrm-level panel data on Czech manufacturing Þrms between 1995 and 1998, I Þnd that: (i) the learning effect of R&D is more important than the innovative effect in explaining the(More)