Here is some literature that may help you from the U.S.
Audretsch, D. B. (2003). Standing on the shoulders of midgets: The U.S. Small Business Innovation Research Program (SBIR). Small Business Economics, 20(2), 129-135.
This study investigates the Small Business Innovation Research (SBIR) Program, focusing on its value and ability to create competition among small firms.
Cooper, R. S. (2003). Purpose and performance of the Small Business Innovation Research (SBIR) Program. Small Business Economics, 20(2), 137-151.
In this study, the author reviews the impact and benefits of the SBIR Program.
Craig, B. R., Jackson, W. E., & Thomson, J. B. (2007). Small firm finance, credit rationing, and the impact of SBA-guaranteed lending on local economic growth. Journal of Small Business Management, 45(1), 116-132.
This paper examines Small Business Administration (SBA) loans and their impact on local market economic growth.
Svensson, R. (2008). Innovation performance and government financing. Journal of Small Business and Entrepreneurship, 21(1), 95-116.
In this article, the author explores the correlation between external financing and the commercial execution of firm patents.
the financing of entrepreneurial projects is desirable as long as the stage of development of the project is clearly identified ... finance is not the same prototypes, test marketing, or commercial validations ... in Colombia we have some tools and other private government which seek to foster entrepreneurship .... Tell me if you need more information.
On the contributions of Cassandra in particular I must say that the text of Svensson is very good ...
I would like to thank you particularly when you clarify that the project should have an estimated horizon, I mean, when you have data describing future cash flows primarily related to market returns.
but, what do you think of entrepreneurs who have that information and require capital to start operations?, knowing that in Latin America the rate of bankruptcy for new companies is very high, should be funded by governments those projects starting from just the idea without a company ongoing?
Thanks again, I'm considering your comments on my research paper
I think governments should make some investment in these companies , but not only with the idea, this kind of investment requires a structured process and a pipeline that allows to have a constant flow of good ideas and good companies constantly.
Here in Colombia we have some examples (http://rutanmedellin.org/index.php/es or http://www.manizalesmas.org/ ) of this type of coordination between national and regional governments with universities and private companies seek to generate better results with small investments.
So to conclude I must say , if the government should invest , but not in ideas, but more structured processes .
Let me know, if you need more information, and thanks for the consideration...