Kouichi Kuroki

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This study was undertaken to investigate a certain regulation of the chin cap force to a growing human mandible, especially with regard to the effect on the growth amount and timing by means of allometric relation between stature and craniofacial complex. Materials were consisted of roentgencephalograms which had been taken from fifteen Japanese females(More)
Recognizing that goods are produced in different sub-regions within a country, we offer new evidence of variety expansion in nation’s export. We decompose Japanese national exports into 41 prefecture sub-regions over 7,000 product categories and construct export margins for sub-regions between 1988 and 2005. First, we find that extensive margin accounts for(More)
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