Abstract This thesis investigates interest rate pass-through under different scenarios. The first study examines the impact of bank consolidations on interest rate pass-through in Singapore and Malaysia using an asymmetric error correction model. Our findings show that for Singapore the markup is higher and that the pass-through of deposit rates to prime rates is less complete in the post-consolidation period. For Malaysia, the markup is lower and the pass-through is more complete in the post-consolidation period. Our findings also reveal that the asymmetric short-term pass-through is exacerbated in Singapore and mitigated in Malaysia in the post-consolidation period. The evidence indicates that bank competition decreased in Singapore but increased in Malaysia after bank consolidations. The second study uses the ARDL bound test and an error correction model to examine the effect of the interest rate liberalization on the effectiveness of monetary policy transmission in China. We divide the sample period into the pre-liberalization and post-liberalization sub-periods and focus on the pass-through from policy rate to bank lending rate. We find that after the liberalization the mark-up is lower and both the long-run and short-run of the interest rate pass-through become faster and more complete. We find some evidence that an upward adjustment of lending rate is faster than its downward adjustment as a response to changes in policy rate before interest liberalization, but the asymmetric interest rate responses disappear afterwards. We attribute our findings to the ongoing reforms of China’s banking system, which has improved the competitiveness of Chinese commercial banks and the effectiveness of China's monetary policy transmission. The third study uses the mixed data sampling (MIDAS) model to examine whether the daily conventional money market overnight rate influences the monthly investment rate of Islamic deposits in Malaysia. Empirical evidence shows that the conventional overnight rate has a positive effect on the Islamic deposit rate and the results are consistent for Islamic deposit rates with different maturities. As the lag length of the daily conventional ovenight rate increases to 15 days, the marginal effect of the lagged conventional overnight rate first decreases and then increases, resulting in a positive aggregate effect. The positive aggregate effect remains when the lag length of the daily conventional overnight rate extends to 90 days. Additional evidence shows that the daily conventional overnight rate has a similar effect on the conventional deposit rate. These findings add to the literature by providing additional evidence that Islamic banking is significantly influenced by the conventional overnight rate, suggesting that Islamie banking operates indistinguishably from conventional banking