%0 Conference Paper %K Power system reliability %K Electricity markets %K Demand response %K Renewable generation integration %K Smart grid %K Market sectors %K LR12-003 %K Market and value %A Jason S MacDonald %A Peter Cappers %A Duncan S Callaway %A Sila Kiliccote %B Grid-Interop 2012 %C Irving, TX %D 2012 %S Grid-Interop 2012 %T Demand Response Providing Ancillary Services A Comparison of Opportunities and Challenges in the US Wholesale Markets %2 LBNL-5958E %8 12/2012