Sceptical climate researcher won't divulge key program - environment - 18 December 2009 - New Scientist

"Some of those questioning the scientific consensus on climate change have long demanded that climate scientists release all their data and code, an issue that has come to the fore following the "Climategate" affair. Some climate scientists reject such calls, in part because the data and code relating to published studies can have commercial value. Many others, however, welcome the idea because it will make research much easier. Back in 2003, Michael Mann, now at Penn State University in University Park, initially refused to make available the data and code relating to the "hockey stick" graph. Now he is releasing all the data and code relating to his papers. Researchers like Benestad say the demand for more open access and increased transparency should also apply to researchers who question the scientific consensus, making it far quicker and easier to settle debates about errors in papers...."