This book examines the determinants of real exchange rates (RERs), with an emphasis on the roles of a pegged exchange rate regime and capital account opening in driving the persistent real exchange rates appreciation in the lead-up to the 1997 currency crisis, through an in-depth case study of Thailand. The book aims to inform the debate, rekindled by the recent currency crises in emerging market economies, on exchange rate policy choice and the timing and sequencing of capital account opening.