İktisat Bölümü Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12514/95

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Citation - Scopus: 1
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.
Citation - WoS: 1
Citation - Scopus: 3
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.
Citation - WoS: 12
Citation - Scopus: 13
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.
Citation - WoS: 1
Determination of Women Voting Behavior: a Machine Learning Approach in the Turkish Political Arena
(Hipatia Press, 2020) Caha, 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.
Citation - WoS: 64
Citation - Scopus: 68
Effect of Economic Policy Uncertainty on Co2 With the Discrimination of Renewable and Non Renewable Energy Consumption
(Pergamon Elsevier Science Ltd, 2024) Aslan, Alper; Ilhan, Ozturk; Usama, Al-Mulali; Savranlar, Buket; Polat, Melike Atay; Metawa, Noura; Raboshuk, Alina
The link between policy -related economic uncertainty and the environment has a new and developing literature. In this study, the effects of economic policy uncertainty, energy consumption and economic growth on pollution in G7 countries are investigated by using methods of moments quantile regression over the perod of 1995-2018. According to the long run coefficient estimation results, in the model in which the fossil fuel energy consumption variable is used as an energy consumption indicator, economic policy uncertainty has a reducing effect on emissions at all quantile levels. Although this negative effect becomes more pronounced as the quantile level increases, it is statistically insignificant at the 0.90 quantile level. In the model that includes fossil fuel energy consumption, the coefficient of economic policy uncertainty variable is negative in all quantiles and is significant only at the 0.30 and 0.40 quantile levels. In addition, while a U-shaped relationship is detected between economic growth and emissions in these countries, the destroying effect of fossil fuel energy on environmental quality is confirmed in all quantiles. Thus, it should be a priority to support the developments in growth performance with environmental regulations, encourage energy -saving and energy -efficient practices as well as to establish the legal infrastructure.
Evaluation Of The Relationship Between Foreign Trade Liberalization And Unemployment Within The Framework Of The Heterogeneous Firm Model;
(Sosyoekonomi Soc, 2022) Cirkin, Zeynep; Goksel, Turkmen
This study investigates how foreign trade liberalization affects unemployment by using the Melitz model (2003), which is one of the intra-industry trade models expressing trade between countries with similar technologies, preferences, and cost structures that make up a large part of international trade. The Melitz model (2003) is remodelled by efficiency wage theory to endogenize unemployment. The model is solved by numerical method. It is assumed that market expansion and competition in the market occur simultaneously. The effect of liberalization on unemployment varies depending on which of two factors, market expansion or competition, dominates the other. According to the results, unemployment decreases when market expansion dominates the competition, while unemployment increases if competition dominates market expansion. In addition, it has been observed that there is an increase in the total amount of production, productivity, and unemployment insurance when market expansion is dominant. Also, it has been observed that there is a decrease in the total amount of production, productivity level, and unemployment insurance when competition in the market is dominant.
Citation - WoS: 1
Citation - Scopus: 2
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.
Citation - WoS: 17
Citation - Scopus: 19
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%.
Citation - WoS: 6
Citation - Scopus: 10
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.
Citation - WoS: 4
Citation - Scopus: 3
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.
Misspecified Expectations in an Open Economy
(Elsevier, 2024) Yilmaz, Yusuf Omur; Cicekci, Cumhur
In the past two decades, Turkey has experienced multiple changes in its monetary policy regime.To analyse how these policy changes affect the behaviours of households and firms, somebehavioural parameters are incorporated into a small open economy New Keynesian model. Ourapproach consists of four phases. First, we assess the impacts of the behavioural parameters onthe model and find that higher values of the parameters increase the effects of expectationson the model. Second, for the period between 2006 and 2021, the model is estimated for theTurkish economy and the findings show that both households and firms are more forward-looking in their decision making. Moreover, the current variables have a weak effect on thenominal interest rate, and the inertial nominal interest rate has a strong effect on it. Third, weanalyse the evolution of the model parameters over the period and find that the behaviouralparameters tend to increase, while the monetary policy becomes more inertial. Finally, weconclude that the Central Bank should follow Domestic Inflation-based Taylor rule to minimise welfare loss
Multiple Decision Analysis on Turkey's Tax Justice: An Institutional Perspective
(ESKISEHIR OSMANGAZI UNIV, FAC EDUCATION, 2019) Cuhadar, Pinar Ozdemir; Bulgurcu, Berna
Kurumsal tercihler, vergi politikası da dahil olmak üzere kamu politikalarını oluştururlar. Vergi adaleti, vergi yükünün vatandaşlar arasında eşit dağıtılması olarak tanımlanmaktadır. Vergi mükellefleri, vergi sisteminin adil olduğunu algılar ise vergiye uyumla birlikte vergi gelirleri de yükselecektir. Bu çalışmanın amacı Türkiye’de ki kurumsal değişimlerin 1980-2015 yılları arasında vergi adaletine etkisini değerlendirmektedir. Bu amaçla Fuzzy AHP, TOPSIS ve VIKOR gibi çoklu karar verme yöntemleri kullanılmıştır. Sonuçlar 1991-1995 döneminin vergi adaleti açısından en başarılı dönem olduğuna işaret etmekted
Citation - WoS: 34
Citation - Scopus: 38
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.
Citation - WoS: 18
Citation - Scopus: 17
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.
Citation - WoS: 16
Citation - Scopus: 21
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.
Citation - WoS: 15
Citation - Scopus: 14
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.
Citation - WoS: 12
Citation - Scopus: 9
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.
Citation - WoS: 7
Citation - Scopus: 9
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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