Phenomenological Implications of the Topflavor Model

We explore phenomenologies of the topflavour model for the LEP experiment at $m_{_Z}$ scale and the atomic parity violation (APV) experiment in the $C_s$ atoms at low energies. Implications of the model on the $Z$ peak data are studied in terms of the precision variables $\epsilon_i$'s. We find that the LEP data give more stringent constraints on the model parameters than the APV data.Comment: 23 pages (including 5 .eps figs), ReVTeX, the 1st revised version, to appear in Phys. Lett.

Recovery and Sustainability in East Asia

This paper analyzes the macroeconomic adjustment from the crisis in East Asia in a broad international prospective. The stylized pattern from the previous 160 currency crisis episodes over the period from 1970 to 1995 shows a V-type adjustment of real GDP growth in the years prior to and following a crisis. The adjustment shows a much sharper V-type in the crisis episodes with the IMF program, compared to those without. Cross-country regressions show that depreciation of real exchange rate, expansionary macroeconomic policies and favorable global environments are critical for the speedy post-crisis recovery. In this sense, the East Asian process of adjustment is not much different from the stylized pattern from the previous currency crisis episodes. However, the degree of initial contraction and following recovery has been far greater in East Asia than what the cross-country evidence predicts. This paper argues that the sharper adjustment pattern in East Asia is attributed to the severe liquidity crisis that was triggered by investor's panic and then amplified by the weak corporate and bank balance sheet. We find no evidence for a direct impact of a currency crisis on long-run growth.