Why would a local or regional development agency in an OECD country apply a method that has been developed and applied in emerging countries?

There are strong reasons to do this. Local economic development often is hampered by the fragmentation of players and the dominance of complex planning processes, irrespective of the type of country you are operating in. PACA gives you a tool to deal with fragmentation in a pragmatic way, and to identify quickly implementable LED activities. PACA is an approach that combines a strong communication element with territorial analysis, project identification and project planning.
In order to assess the fit of PACA with your needs, what you do is this:

• You get in touch with PACA Specialists. You discuss your needs with them, and they will develop a customised version of PACA that exactly matches your needs. This may be a number of highly effective and efficient Mini-workshops and other PACA tools or a complete PACA Exercise.
• You contract the PACA Specialist to assist you in organising this, and to take the lead in implementation. The PACA Specialist will devote a serious amount of time to explaining the underlying concepts to your staff, so that they can take the lead in the implementation of PACA activities and the follow-up.