Averaged over 30 years, the trend is for an annual 7 percent reduction in the dollars per watt of solar photovoltaic cells.
This is all to the good, of course. Even a solar skeptic like myself wants to see more power options: I'd love for my skepticism to be mistaken. But that's not what interested me.
When you read that article you'll see a graph, showing the cost per watt of solar cells from 1980 to the present. It's a steady downward march. Is there any correlation between that trend and government subsidies or research grants into solar power? I was unable to find any good historical data on that kind of spending: solar is often lumped in with "renewables" that would include wind, hydroelectric and geothermal power.
There's big bucks to be made in solar if the efficiency improves enough, and the recent Solyndra scandal shows that the government isn't so good at allocating research and development dollars. Maybe it's time to see if this solar Moore's Law can sustain itself without throwing tax dollars at it? Just a thought.