In this paper I examine whether change occurred in migration decision of workers. Observation from Thai data shows that migration to Bangkok is mostly pursued by young workers despite uncertainty attributed to urban wages. The urban wage uncertainty is related to signals for un-observed ability of potential migrant. Empirical results from Thai data show that learning about own ability worked as a motive for relocation to Bangkok in the pre-crisis but not in the post-crisis period. I also show that the component of such structural change in the relocation behavior is mostly attributable to an increase in the noise variance of urban wage signals after the crisis.