PROF. DR. NEYRE TEKBIYIK ERSOYPROF. DR. SERKAN ABBASOĞLU2025-10-282025-10-28https://dspace.academy.edu.ly/handle/123456789/1811In addition to this, some models are developed to investigate the relationship between RE installed capacity and the patents. The linear regression analyses suggest that RE policies promote the development of RE installed capacity in the three countries in different proportions. For example, it is found that each additional wind policy will increase the RE wind capacity in China, Brazil, and the USA by 1.63, 0.689, and 1.576 GW, respectively. Moreover, the economic instruments turn out to be more effective in promoting the RE installed capacity in the USA and Brazil, while the policy support and regulatory instruments are the most influential policy categories in China. Furthermore, the linear regression analyses indicate the existence of a positive significant relation between the number of patents and the total RE installed capacity in the three countries. It should also be noted that, models generated by nonlinear analysis outperformed linear models (showed better prediction accuracy) in linking total RE capacities with RE policies and patents.Countries differ in terms of their socio-economic development, population growth, and energy consumption. Many countries still depend on conventional energy to supply enough energy source for their demand, while some have made considerable progress in making the transition to renewable/sustainable energy sources. Owing to the increasing demand and drawbacks of conventional energy sources, policies can play a major role in encouraging and increasing the uptake of Renewable Energy (RE) technologies. According to (IRENA, 2018a), the top three countries in terms of total installed RE capacity at the end of 2017 were China, USA and Brazil, which have shown strong leadership and innovation in developing and implementing renewable energy policies. Therefore, these countries were selected for analysis in this thesis. The main motivation behind this selection was to identify the reasons behind their success, so that other countries can benefit from their experiences.DEVELOPMENT OF RENEWABLE ENERGY