Yash P. Mehra (1999) - A Forward-Looking Monetary Policy Reaction Function, Richmond Fed

The Federal Reserve’s reaction function, which summarizes how the Federal Reserve (Fed) alters monetary policy in response to economic developments, plays an important role in macroeconomic and policy analyses. It can be helpful in predicting actual policy actions, thereby serving as a benchmark for assessing the current stance and the future direction of monetary policy. Also, in macro models, the reaction function is central in evaluating Fed policy and determining effects of other macro policies or economic shocks, implying macroeconomic performance may itself depend upon the conduct of monetary policy. Consequently, there is considerable interest in identifying the nature of actual policy pursued by the Fed and determining whether the estimated reaction function fostered or hindered macroeconomic stability.1

José R. Sánchez-Fung (2002) - Estimating a Monetary Policy Reaction Function for The Dominican Republic, Discussion Paper 02/01 University of Kent

This paper specifies and estimates a hybrid monetary policy base reaction function for the Dominican Republic (DR). The estimated reactions suggest that the Central Bank has been biased towards targeting the gap between the
parallel and official exchange rates, apparently doing so in a more systematic fashion after the mid 1980s. Remarkably, these findings are in line with the Central Bank’s long-standing endorsement of a multiple exchange rate regime, and could imply a process of learning, given the monetary authorities’ preferences.

And some small snippets; Wikipedia and the Apelia Economics Blog.