When and How to Support Renewables?—Letting the Data Speak - Green Energy and Efficiency: An Economic Perspective - page 304

Fig. 10 Predicted response to an increase in RD&D spending in Germany by one standard
deviation on patenting in solar ( left ) and wind ( right ) in Germany
according to the model we estimated coincide with increasing the number of patents
by approximately 3 patents (9 % over baseline) per year in the subsequent period.
This effect is even more pronounced when we consider wind patents, where the
hypothetical scenario shows sustained increases in patents per year, going up to
100 % increases over the baseline.
3.2 Effect of Only Deployment
As presented in Fig. 11 , the effect is rather different in the case of deployment.
Here, an increase in solar deployment spending from 2002 onwards would
according to our model coincide with increasing the number of solar patents by
about 10 patents per year (approximately 30 % above the baseline). However, the
effect is more muted for wind patents where we do observe an increase albeit a
smaller percentage above the baseline.
3.3 Effect of Policy Combination
For the policy combination, we consider what could have happened if RD&D and
deployment were increased simultaneously in the respective technologies. The
results presented in Figs. 12 and 13 demonstrate additional patents that would result
from the policy combination over the effects of either individual policy on its own.
Here, the non-zero effects show us that the combination of policies is greater than
simply the sum of their parts. In fact, for wind the additional benet in terms of
patents when joining policies is up to 25 % (1 % for solar).