Scopus İndeksli Yayınlar Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12514/3596

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Application of muntz-legendre polynomials for solving complex differential equations
(Sigma Journal of Engineering and Natural Sciences, 2021) Düşünceli, Faruk; Çelik, Ercan
This paper has obtained the numerical solutions of complex differential equations using the Müntz-Legendre Polynomials. The technique was performed on test problem. Then, different technical error analyses were applied to the test problem. Finally, when exact solutions and numerical solutions were compared with tables and graphs, it was realized that our method is practical and reliable.
Beef and milk price links in Turkey
(2013) Saghaian Sayed; Özertan Gökhan; Tekgüç Hasan
This article addresses the recent beef price spikes in Turkey, using contemporary time-series analysis. The arguments point to the impact of low milk prices that led to liquidation of dairy herds and decline of beef prices initially due to the liquidation and increased meat supply, and subsequent price increases in the next year due to decreased supply. The results revealed that dairy herd liquidation had a delayed impact of a year to 18 months on farm, wholesale, and retail beef prices, Those effects wore off over a two-year time period.
The Cittaslow Philosophy in the Context of Sustainable Tourism Development; The Case of Turkey
(Tourism Management, 2014) Ekinci, Mehmet Behzat
This paper studies the Cittaslow (slow city) philosophy in terms of sustainable tourism development (STD); and in this context research was undertaken for the case of Turkey. Cittaslow, a movement rooted in STD philosophy, aims to encourage the development of tranquil cities already known for their historical, natural, socio-cultural, and touristic features and the intention is to offer a significant contribution to systematic and rapid implementation of STD on a global scale. This paper, which makes a particular study of the practice of STD in Turkey, offers new candidate cities (Uzungöl, Hasankeyf, Safranbolu, Ürgüp, and İznik) and, thus, endeavours to contribute to the spread of STD throughout the whole country. In this study, above-named cities were found to be particularly good candidates for Cittaslow membership. In addition to these: Tatvan, Midyat, Alanya, and Fethiye were also found to be potential Cittaslows even though they fail to meet the population criterion.
Construction labour, subcontracting and masculinity: “construction is a man’s job”
(Construction Management and Economics, 2020) Çınar, Sidar
This study examines how construction workers construct their male identity on the basis of their job requirements. A qualitative field research comprising in-depth interviews was conducted with 32 construction workers in Diyarbakır to examine subcontracting in Turkey’s construction sector. The findings show that by defining construction labour in terms of physical capacity, an outcome of the labour conditions shaped by the practice of subcontracting, construction work have become naturalised as a man’s job. The findings also illustrate how construction produces different masculinities that intersect with the understanding of working class shaped by the role of men being the head of the family rather than a single notion of manhood shaped by physical working conditions. Nevertheless, the male worker culture that feeds off different masculinities still retains the power to dominate and exclude women as workers from the construction site, e.g. through means of sexual harassment.
Determination of women voting behavior: A machine learning approach in the turkish political arena
(International and Multidisciplinary Journal of Social Sciences, 2020) Çaha, Havva; Bayyurt, Nizamettin
Justice and Development Party (AKP) has been the ruling and biggest party in Turkey (AKP) since it has been established in 2002 and Republican People’s Party (CHP) has been the main opposition party (CHP) since then. These two parties receive about 75% of all the votes. In Turkey half of the voters are females. In this study, the important attributes of women in party selection decisions are analyzed. To our knowledge, there is no such a study focusing on women’s party preferences in Turkey. Additionally, this is one of the very few studies in Turkey concerning voters’ party preferences. Therefore, this study aims to fill this gap in the literature. Center-periphery and social mobility theories are the two main theories explaining Turkish political life. The analyzed ideological, cultural, religious, social, economic and demographic characteristics of women supporters are selected according to these theories. Machine-learning techniques are employed as predictive tools. Results show that ideological attitudes like being leftist-rightist and religious values like headscarf, fasting in Ramadan, and praying are the most important effective attributes on party selection of women. However, socio-economic, cultural, educational and demographic atributes are not effective on party selection of women in Turkey.
GENDER EFFECT IN EXPLAINING MOBILITY PATTERNS IN THE LABOR MARKET: A CASE STUDY OF TURKEY
(WILEY, 2014) Eryar, Değer; Tekgüç, Hasan
This paper examines the importance of gender for different job mobility patterns using an extensive household survey data from zmir, the third largest city in Turkey. The determinants of job-to-job and job-to-nonemployment transitions are analyzed with the help of a multinomial logit estimation method. The results indicate that there is a distinction regarding the probability of job mobility patterns based on gender. It is more likely for women to be engaged in job-to-nonemployment transition, whereas men tend to change jobs more often. Although gender plays a significant role in job mobility patterns, traditionally imposed social constraints associated with childcare and household duties provide us with mixed results considering the behavior of women in the job market. On the other hand, having highly paid and secure jobs decreases the probability of both patterns of job mobility.
Impact of fossil fuels and renewable energy consumption on economic growth in Paris Club Countries
(AIP Publishing, 2022) Öztürk, İlhan; Öztürk, İlhan; Aslan, Alper; Özsolak, Baki; Atay Polat, Melike; Turan, Zubeyir
The relationship between economic growth (in terms of GDP) and renewable energy (RE) and nonrenewable energy (NRE) consumption was investigated in 20 countries featured on the Renewable Energy Country Attractiveness Index list, also known as the Paris Club. The effect of both RE and NRE consumption on economic growth is discussed in the growth model based on the neoclassical production function. Labor and capital, which are important dynamics of growth, are also considered in the model. Granger causality and panel vector autoregression analysis are performed for the period 1991–2016. The results show that neither RE nor NRE consumption has a positive effect on economic growth. In reality, a 1% increase in RE consumption will reduce the GDP growth by 0.14%. For the effect of GDP growth on energy types, if growth increases by 1%, NRE consumption increases by 5.54%. If economic growth increases by 1%, a reduction of 1.73% occurs in RE consumption. In contrast, a causal link between both types of energy to growth has not been determined. There is no statistically significant coefficient of NRE and capital factors on GDP. A mutually positive and statistically significant relationship was determined between labor and growth. According to the results of variance decomposition, the basic dynamic of growth is itself: over a ten-year period, growth was affected by itself by 98%.
The impact of social norms on women's employment and gender policies in the middle east
(Gender and The Labor Market: Key Facts and The Trends in Equal Employment, 2021) Çuhadar, Pınar; Körpe, Behiye
[No abstract available]
The impact of technological innovations on the environmental Kuznets curve: evidence from EU-27
(Springer, 2024) Ercan, Hamdi; Savranlar, Buket; Atay Polat, Melike; Yiğit, Yüksel; Aslan, Alper
The EKC hypothesis expresses the inverted U-shaped relationship between per capita income and environmental quality. In the literature, the role of technological innovations and income inequality on pollution is a relatively recent discussion in the studies testing the EKC hypothesis. The aim of this paper is to investigate the impact of technological innovations, income inequality, exports, urbanization, and growth on CO2 emissions in EU-27. In addition, while investigating this relationship, exports and urbanization are also considered and panel vector autoregression (PVAR) analysis is applied for the 2005-2019 period. According to the coefficient estimation results, while income inequality, exports, and urbanization increase pollution, technological innovations contribute to environmental quality. Also, the results demonstrated that the EKC hypothesis is invalid in these countries and there is a U-shaped relationship between growth and emissions. The causality test results revealed the presence of unidirectional causality running from all explanatory variables to CO2 emissions. Moreover, impulse-response graphs demonstrated that the reply of emissions to the shocks in the explanatory variables is similar to the long-run coefficient results. In conclusion, all available empirical evidence for this relationship highlights that income inequality and technological innovations should be considered in policy-making processes to ensure environmental quality in EU-27 countries.
Investigation of the Sensitivity of EU Countries to Temperature Anomalies in Terms of Economic and Technological Indicators
(SpringerLink, 2023) Atay Polat, Melike; Alper Aslan, Buket Altinoz, Melike Atay Polat
In this study, the interrelationships between global climate change and EU countries’ GDP, investments, R&D expenditures, innovations, and labor productivity indicators are discussed. Global temperature anomalies are adopted as an indicator of climate change and the relationsgip estimated with the panel vector autoregreesion (PVAR) approach for the period from 1996 to 2018. Results suggest that an increase in atmospheric temperature has negative efect on economic growth, investment, and labor productivity. However, an increase in atmospheric tempetrature increases patent applications by 0.4% in the long run. Moreover, while economic growth and investments trigger temperature anomalies, labor productivity has a negative efect on atmospheric temperature. The long-run coefcient estimation results are confrmed by analysis, and the existence of strong dynamic relationships between the variables is determined. Impulse–response graphs difer from these results and emphasize that the efects caused by shocks should be considered temperature anomalies and EU’s technological and economic developments.
Is electronic finance sustainable or not in the European Union? New insights from the panel vector autoregression approach
(SpringerLink, 2022) Altınöz, Buket; Aslan, Alper; Atay Polat, Melike; Topalgokcelli, Emre; Esmeray, Murat
Abstract Today, as a result of the developments and widespread use of information and communication technologies, the weight of online shopping in the economy has increased. The environmental impacts of this new order, which is an important part of electronic fnance, are discussed. In this study, the efect of electronic fnance, economic growth, renewable energy consumption, and urbanization on emissions in EU member countries is examined using the panel vector autoregression (PVAR) approach for the period from 2005 to 2018. The main results suggest that e-fnance has a positive and statistically signifcant efect on CO2 emissions. However, the renewable energy consumption-increasing efect of e-fnance is greater than its emission-reducing efect. Moreover, renewable energy consumption has a statistically insignifcant efect on emissions. Therefore, the contribution of e-fnance on environmental quality weakens. The requirement for EU member countries to prioritize the use of environmentally friendly energy to beneft from the environmental contribution of e-fnance in the most optimal way is stated as the main policy implication of this study
Market power in the poultry sector in Turkey
(Bogazici Universitesi, 2014) Özertan Gökhan; Saghaian Sayed; Tekgüç, Hasan
Rekabet Kurumu (RK), 2009 yılında 27 etlik piliç üreticisini arzı kısma ve fiyatları kontrol etme üzerinde anlaşarak kartel oluşturmaları sebebiyle cezalandırmıştır. RK, ceza kararını belli başlı etlik piliç üreticilerinin aralarında yapmış oldukları görüşme kayıtlarına ve ham fiyat verilerine istinaden vermiş olup herhangi bir istatistiksel ya da ekonometrik analizden faydalanmamıştır. Bu araştırmada, zaman serisi yöntemleri kullanılarak etlik piliç sektörü arz zincirinde piyasa gücü hem arz hem de talep açılarından test edilmiştir. Sonuçlar, etlik piliç arz zincirindeki perakende fiyat davranışlarının oligopolistik piyasa yapısı ile tutarlı olduğunu göstermektedir.
New exact solutions for the doubly dispersive equation using the improved Bernoulli sub-equation function method
(Indian Journal of Physics, 2021) Düşünceli, Faruk; Çelik, Ercan; Askin, Muzaffer; Bulut, Hasan
In this study, the doubly dispersive equation is presented by the application of the improved Bernoulli sub-equation function method (IBSEFM). The doubly dispersive equation which is a nonlinear partial differential equation is transformed into nonlinear ordinary differential equation using a wave transformation and then is solved by IBSEFM. Some new solutions are successfully constructed. All the obtained solutions in this study have been satisfied the doubly dispersive equation. In the present study, we have used Wolfram Mathematica 9 software for all of the computations and graphic plottings.
New Exponential and Complex Traveling Wave Solutions to the Konopelchenko-Dubrovsky Model
(HINDAWI LTD, 2019) Dusunceli, Faruk
The Konopelchenko-Dubrovsky (KD) system is presented by the application of the improved Bernoulli subequation function method (IBSEFM). First, The KD system being Nonlinear partial differential equations system is transformed into nonlinear ordinary differential equation by using a wave transformation. Last, the resulting equation is successfully explored for new explicit exact solutions including singular soliton, kink, and periodic wave solutions. All the obtained solutions in this study satisfy the Konopelchenko-Dubrovsky model. Under suitable choice of the parameter values, interesting two- and three-dimensional graphs of all the obtained solutions are plotted.
The nexus among climate change, economic growth, foreign direct investments, and financial development: New evidence from N-11 countries
(Environmental Progress and Sustainable Energy, 2021) Atay Polat, Melike; Aslan, Alper; Altınöz, Buket
The aim of this article is to investigate the relationship between air pollution, economic growth, energy use, trade openness, foreign direct investment, and financial development in N-11 countries data period from 1980 to 2018. For this purpose, it is adopted the Panel Vector Autoregression (PVAR) model for the estimation of the long and short-run effects. The results suggest that although energy consumption and financial development have a negative impact on CO2 emissions, foreign direct investment leads to an increase in pollution. In addition, there is bidirectional causality between financial development and CO2 emissions and energy use, carbon dioxide emissions and energy consumption, foreign direct investments and energy consumption, and financial development and energy consumption. In addition, there is unidirectional causality from carbon dioxide emissions to GDP, from energy consumption to GDP, from foreign direct investments to CO2 emissions and GDP, from financial development to GDP. Finally, impulse-response functions indicate the validity of the EKC hypothesis in these countries.
Oligopoly and Price Transmission in Turkey's Fluid Milk Market
(WILEY-BLACKWELL, 2013) Tekgüç, Hasan
Farmers and consumers suspect that processing firms abuse their power in the milk marketing chain by engaging in price fixing behavior. The author employs threshold autoregressive and moment threshold autoregressive tests, and contrary to expectations, finds evidence for a downward trend in wholesale milk price without a corresponding decline in farm-gate prices. The downward trend coincides with increased competition in the dairy industry and with the growing market share of the formal sector at the expense of the informal sector. Major dairy processing firms expand their market share and yet continue to enjoy healthy profits thanks to increasing returns due to economies of scale in their processing and distribution operations in a growing market. (C) 2013 Wiley Periodicals, Inc.
Sağlıkta bireysel sorumluluk ve rekabet toplam maliyetleri neden düşürmez?
(2015) Tekgüç, Hasan; Atalay Güneş, Zehra Nurdan
Öz: Bu çalışmanın amacı, Türkiye’de Sağlıkta Dönüşüm sürecini egemen iktisat anlayışı konumundaki neo-klasik yaklaşıma referansla tartışmaktır. Sağlık Bakanlığı (SB), son dönemde hızla artan sağlık harcamalarını kontrol altına alabilmek için, sağlık harcamalarının finansmanında kısmen de olsa hastaların kişisel sorumluluğunu arttıran yönde uygulamalara yönelmiştir. SB, ayrıca hem kamu hastanelerinden hem de özel sektörden hizmet alırken verimliliği artırmak amacıyla performansa dayalı ödeme sistemine geçmiştir. Tıp camiası sağlığın sosyal bir hak olduğu ve sosyal hakların kısıtlanamayacağı gerekçesiyle bu uygulamalara karşı çıkmaktadır. Halbuki, neo-klasik iktisat yazınında da bireysel sorumluluk ve performansa dayalı ödeme uygulamalarının sağlık finansmanında sorunlara çözüm olmadığı hem teorik hem de ampirik olarak ortaya konulmaktadır.
Separability between own food production and consumption in Turkey
(SPRINGER, 2012) Tekgüç, Hasan
Complete markets imply the separation of food production and consumption decisions such that they can be modeled to occur sequentially and can be studied independently. Separation is very often assumed implicitly in empirical studies of food demand. If there is such separation, then food sourced within the household should not have any influence upon the budget share of each food group. Using this insight, this paper first develops a procedure to test for the separation of household food production and consumption decisions. Furthermore, it incorporates the testing procedure into the Almost Ideal Demand Systems model and utilizes survey data from 2003 for Turkey for empirical testing. It concludes that the separation assumption is unwarranted for Turkey. Next, it investigates the extent of bias in elasticity estimates when the separation assumption is unwarranted. It concludes that ignoring the nonseparation of consumption and production decisions in rural areas leads to significant overestimation of food expenditure elasticity for dairy products and eggs and own-price elasticity for bread and cereals.
What are the mistakes we think are correct about the Natural resource curse' hypothesis? New insights from quantile regressions via method of moments for EU
(Elsevier, 2023) Savranlar, Buket; Atay Polat, Melike; Aslan, Alper
The nexus among natural resources and economic growth has recently been extensively studied in the context of the "Natural Resource Curse (NRC)" hypothesis. It is critical to use the latest analysis techniques in the development of the relevant literature. Therefore, this study aims to test the NRC hypothesis in EU member countries applying the Method of Moments Quantile Regression. Moreover, the focus of this study on EU countries for the first time fills an important gap in the literature. Renewable energy consumption, gross fixed capital formation, and urbanization are adopted as control variables. The findings demonstrate the validity of the NRC hypothesis at all quantile levels. Renewable energy consumption contributes to economic growth up to 0.70 quantile level. Additionally, gross fixed capital formation and urbanization have a positive impact on growth at all quantile levels. Empirical outputs highlight the importance of natural resources for growth in EU member countries and raise suggestions for possible policy formulation and implementation processes.

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