Sure. There have been a few studies. We've undertaken one ourselves. Notably, however, I'll start with one from the department of energy in the U.S.
Lawrence Berkeley National Laboratory does wind technology updates every year, and those consistently show that in the past few years it has been trending down in terms of the installed cost per kilowatt. It is subject to raw material costs, and so as raw material prices go up, then certainly some aspects of the cost of wind can also increase. Coupled with improved efficiencies are improvements in technology, which are also highlighted in these reports, and largely a drop in costs. A study we commissioned in British Columbia showed similar trends.