Two other papers on the topic:
* http://socrates.berkeley.edu/~kammen/C226/8r.pdf transporation can account of up to 19% of installation energy cost, so on site or near site production of component should matter (as market expands production site should pop up in more places).
* http://www.concentrixsolar.de/cms/upload/pdf/SCC_3_Lerchenmueller_2005_04_27_Paper.pdf they conclude that 1.5 euros per watt-peak is within reach in case of mass production, assuming 20% load and fx=1.36 that gives 10.20 USD per installed efficient watt, not far from the data I computed.
* http://socrates.berkeley.edu/~kammen/C226/10r.pdf cost per kwh estimates for various solar projects
* http://www.greenhouse.gov.au/renewable/recp/pubs/booklet.pdf energy in Australia
