Hayashi, Fumio. <br/><br/>
The Permanent Income Hypothesis and Consumption Durability:  Analysis Based on Japanese Panel Data / 
Fumio Hayashi. 
 - Cambridge, Mass.  National Bureau of Economic Research  1984. 
 - 1 online resource:  illustrations (black and white); 
 - NBER working paper series  no. w1305 .
 - Working Paper Series (National Bureau of Economic Research)  no. w1305. .
<br/><br/> March 1984. 
<br/><br/> The permanent income hypothesis is tested on a four-quarter panel of about two thousand Japanese households for ten commodity groups. Consumption is a distributed lag function of expenditures, and the utility function is additively separable in time. Durability is defined as the persistence of the distributed lag. The permanent income hypothesis implies that, for each commodity group, expected change in expenditures is correlated neither with past expenditure changes on other commodities nor with expected change indisposable income, if its own lags are controlled for. The main results are the following: (1) durability is substantial even for food and services, (2)the permanent income hypothesis applies to almost all (probably more than ninety percent) of the population, and (3) the habit persistence hypothesis is rejected in favor of the permanent income hypothesis. 
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