Exchange Market Pressure refers to money market disequilibrium that arises due to non-zero excess demand for domestic currency in the foreign exchange market. Exchange rate changes reflect the extent of market pressure in the absence of Central Bank intervention. It is argued that nominal exchange rate changes have consequences for domestic macroeconomic variables. These include domestic output growth, increase in domestic prices, balance of trade, firms' price-setting behaviour in high inflation countries, foreign debt burden of the country, balance of payments and the stability of the domestic financial system. It has been observed that the Central Banks generally intervene in the foreign exchange market to avoid these undesirable consequences of exchange rate changes. In this thesis, we construct exchange market pressure and intervention index for Pakistan using Weymark's (1995) approach. The basic objective is to identify whether it is downward or upward pressure that has remained dominant over the entire sample period. Based on intervention index values, we evaluate the Central Bank's monetary policy over the given sample period. In addition, we also calculate the actual exchange rate and predicted exchange rate using one period lagged exchange rate. We check whether monetary policy is successful in its objective of reducing exchange rate volatility. Finally, we also evaluate the determinants of exchange market pressure in a panel of ten countries. The first empirical chapter utilises difference data and the two-stage least square approach. In the second empirical chapter we adopt Johansen's (1988) cointegration approach. Both of these provide evidence of downward pressure and active Central Bank intervention. Furthermore, these chapters show that the Central Bank's foreign exchange intervention policy is fairly successful in achieving its objective of reducing exchange rate volatility. The initial empirical chapters use a fixed parameter approach. This has the disadvantage that it does not allow the estimated parameters to take account of structural changes. A third empirical chapter addresses this issue and uses the Kalman Filter Time Varying Parameter approach. This has the advantage of allowing the parameters to take account of the effects of structural changes on parameter constancy. The results show unstable estimated parameters. The constructed exchange market pressure and intervention index show downward pressure and the active Central Bank intervention. Thus, this chapter further confirms our earlier findings of downward pressure and active Central Bank intervention. However, despite unstable estimated parameters, Central Bank intervention policy is successful in reducing exchange rate volatility which is unexpected. In the earlier empirical chapters, we assumed direct Central Bank intervention. However, there may be the case that Central Bank may use interest rate for fending off speculative attack. In such a case it is better to include interest rate as component of exchange market pressure to truly reflect the extent of foreign exchange market disequilibrium. Last empirical chapter overcomes this issue and uses Eichengreen et al. (1996) approach for constructing exchange market pressure. It consists of percent changes in exchange rate, relative interest rate differential and relative percent changes in foreign exchange reserves. Furthermore, in this chapter, we evaluate the determinants of exchange market pressure in a panel of ten countries. The results indicate the relevancy of some macroeconomic variables and measures of openness.