This paper reexamines the relationship between aid and domestic tax revenues using a more recent and comprehensive dataset covering 118 countries for the period 1980-2009. Overall, our results support earlier findings of a negative association between net Official Development Assistance (ODA) and domestic tax revenues, but this relationship appears to have weakened in reflection of greater efforts at mobilizing domestic revenues in many countries. The composition of net ODA matters: ODA grants are associated with lower revenues, while ODA loans are not. The paper further finds that net ODA and grants are negatively associated with VAT, excise and income tax revenues, but have a positive relationship with trade taxes. Aid has a particularly strong negative effect on domestic tax revenues in low-income countries and incountries with relatively weak institutions.

Banks' liquidity holdings are comfortably above legal or prudential requirements in most Central American countries. While good for financial stability, high systemic liquidity may nonetheless hinder monetary policy transmission and financial markets development. Using a panel of about 100 commercial banks from the region, we find that the demand for precautionary liquidity buffers is associated with measures of bank size, profitability, capitalization, and financial development. Deposit dollarization is also associated with higher liquidity, reinforcing the monetary policy and market development challenges in highly dollarized economies. Improvements in supervision and measures to promote dedollarization, including developing local currency capital markets, would help enhance financial systems' efficiency and promote intermediation in the region.

This paper provides new evidence on the effectiveness of expenditure rules. The analysis is based on a unique dataset covering all countries with national and supranational fiscal rules, including 33 expenditure rules, between 1985 and 2013. It contributes to the existing literature on fiscal rules in two main ways. First, it is the most comprehensive assessment of compliance with rules and of the potential role of expenditure rules, in particular regarding long-term sustainability. Second, it analyzes whether expenditure rules are associated with changes in public investment and its efficiency.

for useful comments. Any errors and omissions are the authors' sole responsibility. This Working Paper should not be reported as representing the views of the IMF. The views expressed in this Working Paper are those of the authors and do not necessarily represent those of the IMF or IMF policy. Working Papers describe research in progress by authors and are published to elicit comments and to further debate.

This paper reexamines the relationship between aid and domestic tax revenues using a more recent and comprehensive dataset covering 118 countries for the period 1980-2009. Overall, our results support earlier findings of a negative association between net Official Development Assistance (ODA) and domestic tax revenues, but this relationship appears to have weakened in reflection of greater efforts at mobilizing domestic revenues in many countries. The composition of net ODA matters: ODA grants are associated with lower revenues, while ODA loans are not. The paper further finds that net ODA and grants are negatively associated with VAT, excise and income tax revenues, but have a positive relationship with trade taxes. Aid has a particularly strong negative effect on domestic tax revenues in low-income countries and incountries with relatively weak institutions.