Nursing's involvement in policy development has become a standard and
expected part of nursing practice. One avenue of involvement, policy r
esearch, is clarified through description and case example. Policy res
earch is described as context-driven, multimethodological, and time-se
nsitive. Considering these essential characteristics when planning and
implementing policy research enhances nursing's ability to positively
influence the policy process. A case example of policy research from
the criminal justice system evaluated the effectiveness of a diversion
program with alcohol and marijuana misdemeanants (N=1,239). The purpo
ses of the study were to describe the percentage of diversion particip
ants with alcohol or marijuana-possession charges who were successful
in completing the diversion program and to examine the incidence of su
bsequent arrests on alcohol or marijuana-possession charges among thos
e who successfully completed the program. The case example demonstrate
s the intricate and unique relationship between research and the polic
y arena. Policy research can equip nursing to enter policy debates wit
h data and to participate as a persuasive agent of social change.