  We study the effects of threshold resummation on the rapidity dependence of
single-particle-inclusive cross sections, using the prompt photon cross section
as an example. We make use of the full resummation formula at next-to-leading
logarithmic accuracy and develop a new technique for treating rapidity in
resummation. We compare our phenomenological results with those of previous
studies and discuss differences and similarities of the two existing
resummation formalisms.
