Clean energy firms' stock prices, technology, oil prices, and carbon prices

Production costs of alternative energies are still high, but increased demand for oil, future oil supply shortage concerns and climate change concerns, have led to the fast development of renewable energy firms. The sector accomplished has accomplished remarkable progress and attracted attention to clean energy, both at the industry level and at the academic side. With this work we attempt to determine whether or not the placement of a price on carbon emissions encourages investments in clean energy firms. Unlike previous literature we focus on the German case and we address the issue at the individual company level. We were able to verify this link but only for the case of companies whose weight over the amount of total energy produced is relevant, which is the case of solar in Germany.