SPECULATION AND PRICE BUBBLES IN THE KOREAN AND JAPANESE REAL-ESTATE MARKETS

This article investigates the possibility of speculation having caused the prices of land and housing to deviate from their given long-run equilibrium levels in Korea and Japan. We modeled speculation by incorporating the expected future price into the demand equation. The existence of growing rational bubbles was tested on Korean and Japanese data using the standard econometric technique for estimating linear rational expectations models. Our analysis of the Korean annual data suggests that a growing rationale bubble existed during the 1974-1989 period, nominal or real. Estimation results of the same model using Japanese annual data also confirmed the existence of a bubble in land price. Contrary to our analysis of land price data, the evidence of the bubble was much less obvious in Korean annual housing price data. We therefore estimated the model using quarterly data and found that the existence of a bubble could not be established in housing prices. This finding was also consistent with the trend of the rent-to-value ratio series in apartment units. Our results need to be taken with caution because our approach suffers from the common econometric problem of possible mis-specification of the model and because of the small size of the sample.