Topics: Women say they want a nice guy, but date a jerk.?
The results of the research on romantic perception of "nice guys" are mixed and often inconsistent.  Herold & Milhausen conclude that "the answer to the question 'Do nice guys finish last?' is complicated in that it is influenced both by the measurement instruments used and by subject characteristics."
Studies that explicitly use the term "nice guy" sometimes cite research that does not directly use the term, but which addresses behaviours that are often associated with "niceness."
One difficulty in studying the "nice guy" phenomenon is due to the ambiguity of the "nice guy" construct. Participants in studies interpret "nice guy" to mean different things.