LEE_İktisat Lisansüstü Programı - Doktora
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Yazar "Güloğlu, Bülent" ile LEE_İktisat Lisansüstü Programı - Doktora'a göz atma
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ÖgeNetwork neutrality in the internet as a two sided market constituted by congestion sensitive end users and content providers(Graduate School, 2023-03-01) Kaplanlıoğlu, Özgür ; Güloğlu, Bülent ; Ecer, Sencer ; 412152004 ; EconomicsIn this paper, I envision a two-sided market mediated by a monopolistic internet service provider, ISP. The ISP provides end-users internet access and carries content providers' (CPs') data packages on its network. I compare the case where network neutrality is strictly practiced with the case where the ISP can "throttle" the traffic of certain content providers. In the model, for simplicity, a single CP is exposed to throttling, while the other CPs, which are part of a continuum, are not. I then study the implications of the violation of network neutrality on total data consumption, congestion, and capacity investment. Under network neutrality, the decision variables of the ISP are end-user price and network bandwidth. I found that, in equilibrium, because of the monopolistic nature of the market is greater than the price under competitive equilibrium, and is lower than its socially optimum value. Thus, under neutrality, the ISP undersupplies both the capacity and the data. Under discrimination, the ISP is allowed to charge an access fee on unit bandwidth to one of the content providers (the discriminated CP). To reflect a scenario of great practical value, I choose the discriminated CP from one of the big OTTs such as YouTube, Instagram, Facebook, Netflix, etc. In this setting, to access the network, the discriminated CP needs to buy bandwidth from the ISP. However, the bandwidth bought by the discriminated CP is not for exclusive usage of the discriminated CP. It rather acts as an upper bandwidth limit for the discriminated CP. Under discrimination, the decision variables of the ISP are the end-user price, the network bandwidth, and the bandwidth price. I found that when allowed the ISP always prefers to deviate from network neutrality by charging a positive price for bandwidth. Also, the ISP sets just enough to keep the discriminated CP in the market. Comparing the equilibrium outcomes, I show that under discrimination, the ISP charges a lower price to end-users. However, the discrimination also leads to less network bandwidth installed. Both the lower end-user price and the lower network bandwidth contribute to the congestion. Thus, under discrimination, the congestion is higher than under neutrality. Considering its adverse effects on the network bandwidth and congestion, although the end-user price is lower under discrimination, I recommend that the network neutrality principle should not be abolished.
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ÖgeThe digital divide in Turkey(Graduate School, 2023-04-05) Dalgıç Tetikol, Deniz Ece ; Güloğlu, Bülent ; 412162004 ; EconomicsInformation and communication technologies (ICT), which broadly include telecommunications, mobile telephony, the Internet, and various Internet-enabled devices, have permeated most aspects of life by offering new and more efficient ways for people to communicate, access information, and learn. With applications in education, banking, e-commerce, health, and government services, among other areas, ICT are a major force behind economic growth and productivity, connecting people to essential services and jobs while enabling businesses to operate. The digital divide describes the uneven distribution of ICT in society. At a high level, the digital divide is the gap between those who have and do not have access to the Internet. However, the digital divide is not a binary but multifaceted and includes many factors such as connectivity, access to equipment, affordability, quality of service, motivation to use the technology, digital skills, and so on. Therefore, the digital divide encompasses various Internet-related challenges, which results in different types (levels) of digital inequality. The digital divide literature categorized those challenges as follows: differences in access (first-level digital divide), usage and digital skills (second level digital divide), and outcomes of Internet use (third level digital divide). These digital gaps exist at the international level as well as within a country. Often these gaps fall along other social inequalities in a country – that is, the different levels of the digital divide usually reflect the gaps between individuals from different demographic backgrounds and at different socioeconomic levels with regard to their opportunity and ability to access and utilize ICT. This thesis empirically examines the different aspects of the digital divide in Turkey. It explores the demographic and socioeconomic determinants of the first level and second level of digital divide in Turkey and analyzes the data that substantiates digital inequalities between years 2008-2020. Digital transformation and technological advancements in ICT offer tremendous opportunities for countries, especially for emerging economies. However, the full potential of digital advancements cannot be achieved by focusing solely on supply-side policies such as investing in infrastructure deployment. Despite increased Internet penetration rates, Turkey has failed to create a digitally inclusive society and risk missing out on the benefits of digitization. One of the leading factors contributing to this problem is the lack of effective demand-side solutions mitigating the digital divide. The results of this thesis suggest that significant disparities persist between different social groups in Turkey in terms of Internet access and Internet usage patterns. The findings of this thesis point out the target groups of first priority to address the first level and second level digital divide in Turkey. We can conclude from the results that special initiatives and programs are required to increase widespread adoption of the Internet. Those initiatives and programs should be designed and implemented with a participatory approach, targeting the high priority groups: women, older citizens, citizens with lower household income, citizens with low educational background, homemakers, and retired people, as well as citizens of the Northeast Anatolia, Central East Anatolia, Southeast Anatolia and West Black Sea regions of Turkey in particular, while considering the factors that make Internet access and use difficult.
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ÖgeThe impact of economic and financial shocks on macroeconomic fundamentals: Multi country new Keynesian approach(Sosyal Bilimler Enstitüsü, 2020) Güngör, Mahmut Sami ; Güloğlu, Bülent ; 671998 ; İktisatThis dissertation examines the impact of various economic and financial shocks on macroeconomic fundamentals with the help of a multi country modeling approach for the post 1990 era. Its theoretical framework is entirely based on the new Keynesian synthesis. In the first empirical section, I estimate two distinct versions of the three equation new Keynesian model by using the Bayesian techniques to investigate the impact of structural shocks on macroeconomic fundamentals under aggressive monetary policy in Turkey for the period from 2000Q1 to 2019Q1. The practical role of this chapter is to introduce the basic new Keynesian model which forms the fundamental structure of modern macroeconomic models. In the second empirical section, a single country framework is extended to a multi country one to investigate transmission of shocks across economies. First, I define the major trading partners of Turkey to construct a new globe for the multi country new Keynesian analysis. Next, I estimate the global VAR model for the period from 1990Q1 to 2018Q4 in order to obtain steady state values for all variables used in the multi country analysis. Then, I estimate the multi country new Keynesian model for the member countries of the new globe by using the inequality constrained instrumental variables estimator for the period from 1990Q3 to 2018Q4. Finally, a number of plausible economic and financial scenarios are discussed by using both point and bootstrap estimates of impulse responses of related shocks in the dynamic analysis part.