There are a number of sources of information on the factors affecting domestic PSD growth; (pillars of entrepreneurship).

• Informality: The Global Development Research Centre provides an excellent overview of concepts and resources relating to the informal sector at http://www.gdrc.org/informal/index.html

• The enabling environment: the Committee of Donor Agencies for Small Enterprise Development has a number of resources and links to information on donor activity, at http://www.sedonors.org/groups/group.asp?groupid=2 
  

• Business development services (BDS) and capacity-building: An excellent summary source is the BDS Knowledge site maintained by the ILO, at http://www.bdsknowledge.org/dyn/bds/bdssearch.home? 
  

• Linkages and value chains: the Committee of Donor Agencies for Small Enterprise Development has some useful links at http://www.sedonors.org/groups/group.asp?groupid=4

• Microfinance:
• UNCDF has learning resources and links at http://www.uncdf.org/english/learning/index.php
• CGAP has a wealth of information, and links to several other microfinance sites, at http://www.cgap.org/ 
  

• Infrastructure:
• The Public-Private Infrastructure Facility (a multidonor technical assistance facility aimed at helping developing countries improve the quality of their infrastructure through private sector involvement) has several toolkits at http://wbln0018.worldbank.org/ppiaf/activity.nsf/toolkits
• UNDP’s PPPUE programme has a toolkit for municipal managers at http://pppue.undp.org/toolkit/

• Privatization and regulation:  The World Bank provides a number of toolkits on privatization at http://rru.worldbank.org/Toolkits/