{"title":"Use of Weighted Median in Theil-sen Regression Analysis","authors":"N. Erilli","doi":"10.26650/b/ss10.2021.013.11","DOIUrl":"https://doi.org/10.26650/b/ss10.2021.013.11","url":null,"abstract":"Regression analysis; is one of the most used analytical techniques in statistical prediction studies. The aim of regression analysis; to investigate the relationship between the dependent and independent variable or variables, which is estimated to have a cause-effect relationship between them, to explain the assumed relationship between variables functionally and to define this relationship with a model. Non-parametric regression analysis is a method used in cases where some assumptions that are valid for parametric regression methods cannot be met and give successful results. Nonparametric methods make calculations with the median parameter instead of arithmetic mean. The median parameter does not reflect the effect of outliers on the calculations. Weighted Median calculates the contribution of outlier values to the model even though it gives weight to each observation value. In this study, the Weighted Median parameter was used in the Theil-Sen method which is frequently used in nonparametric regression analysis. Optimum and Hodges-Lehmann calculations which are used in the computation of constant parameters in the Theil-Sen method are also used in this study. The results obtained from Theil-Sen, Hodges-Lehmann and Optimum method used with Weighted Median were tested in different data structures. Thus, the advantages or weaknesses of the use of the weighted median parameter in the Theil-Sen method over the classical methods were determined.","PeriodicalId":159872,"journal":{"name":"Ekonometride Güncel Yöntemler ve Uygulamalar","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133996851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Yüksek Teknolojili Ürün İhracatı ve Kurumsal Nitelik Arasındaki Nedensellik İlişkisinin Analizi","authors":"Semanur Soyyiğit","doi":"10.26650/b/ss10.2021.013.27","DOIUrl":"https://doi.org/10.26650/b/ss10.2021.013.27","url":null,"abstract":"","PeriodicalId":159872,"journal":{"name":"Ekonometride Güncel Yöntemler ve Uygulamalar","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134092576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Türkiye’de Cari İşlemler Dengesi ve Sektörel Büyüme İlişkisi","authors":"Serkan Samut, Nebiye Yamak","doi":"10.26650/b/ss10.2021.013.29","DOIUrl":"https://doi.org/10.26650/b/ss10.2021.013.29","url":null,"abstract":"Ampirik literatür cari işlemler dengesi ile ekonomik büyüme oranı arasındaki “nedensel ilişkileri” araştıran çalışma sayısı itibariyle oldukça zengindir. Mevcut çalışmalar içinde Türkiye örneğini de analiz eden çalışmalar bir hayli fazladır. Ne var ki, bu çalışmaların tamamında cari işlemler dengesi ile ilişkilendiren büyüme oranı “genel” ekonomik büyüme oranıdır. Literatürdeki genel bulgu, cari işlemler dengesi ile genel ekonomik büyüme oranın birbirlerini besledikleri yönündedir. Ancak burada akla gelen soru, acaba böyle bir bulguda terkip hatası var mıdır? Diğer bir ifadeyle böyle bir bulguda acaba toplulaştırma sapması var mıdır? Dolayısıyla bu çalışmadaki temel amaç cari işlemler dengesi ile ekonomik büyüme oranı arasındaki olası nedensel ilişkileri sektörel bazda araştırmak ve yukarıdaki soruyu cevaplandırmaktır. Ayrıca Türkiye özelinde cari açıkla yüksek derecede ilişkili ve sorumlu olan sektörleri belirlemek de mevcut çalışmanın bir diğer amacını oluşturmaktadır. Ele alınan dönem 1998:1-2018:3 arasını kapsamaktadır. Veriler üçer aylık olup mevsimsellikten X-12 yöntemiyle arındırılmıştır. Cari işlemler dengesinin ilişkilendirildiği sektörler sanayi, imalat, inşaat, hizmetler, finans-sigorta ve tarım sektörüdür. Çalışmada serilerin bireysel ve birlikteki istatistiksel özelliklerine uygun olarak VAR yöntemi kullanılmıştır. VAR bulgularına göre genel toplamda geçerli olan sektörel bazda geçerli olmamıştır. Genel ekonomik büyüme oranın kullanıldığı analize göre, cari işlemler dengesi ile ekonomik büyüme oranı arasında birbirlerini besleyen bir ilişki mevcuttur. Ancak sektörel büyüme oranlarının kullanıldığı analiz bulgularına göre, sadece büyüme oranı cari işlemler dengesini beslemektedir. Tersi doğru değildir.","PeriodicalId":159872,"journal":{"name":"Ekonometride Güncel Yöntemler ve Uygulamalar","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127941575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Küreselleşme ve Gelir İlişkisine Farklı Bir Bakış: Parametrik ve Semiparametrik Yaklaşım","authors":"S. Güriş, Şaban Kızılarslan, Ebru Çağlayan Akay","doi":"10.26650/b/ss10.2021.013.17","DOIUrl":"https://doi.org/10.26650/b/ss10.2021.013.17","url":null,"abstract":"","PeriodicalId":159872,"journal":{"name":"Ekonometride Güncel Yöntemler ve Uygulamalar","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125823277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Co2 Emission, Energy Consumption And Economic Growth in Brics Countries: Evidence From Cross-Section Dependence and Structural Breaks","authors":"Nilgün Çil","doi":"10.26650/b/ss10.2021.013.08","DOIUrl":"https://doi.org/10.26650/b/ss10.2021.013.08","url":null,"abstract":"","PeriodicalId":159872,"journal":{"name":"Ekonometride Güncel Yöntemler ve Uygulamalar","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114674545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Are Shocks to Unemployment Rate in OECD Countries Permanent or Temporary? Evidence From Unit Root Tests With Non-normal Errors","authors":"Mucahit Aydin, M. Aydin","doi":"10.26650/b/ss10.2021.013.04","DOIUrl":"https://doi.org/10.26650/b/ss10.2021.013.04","url":null,"abstract":"In this paper, we tested the validity of unemployment hysteresis for the 21 Organisation for Economic Cooperation and Development (OECD) countries in the 1990Q1–2017Q3 period using recently developed unit root tests with structural breaks and non-normal errors. There are three different economic approaches to unemployment in the literature: natural-rate hypothesis, structuralist hypothesis, and unemployment hysteresis. Overall, we found support for unemployment hysteresis in 11 of the 21 OECD countries (Australia, Canada, Spain, Finland, France, Italy, Japan, Mexico, Norway, Portugal and Sweden). According to this hypothesis, shocks on unemployment have a permanent effect, and unemployment rates have no tendency to revert to a steady state in the long run. Conversely, the hysteresis hypothesis was rejected for 10 of the 21 OECD countries (Belgium, Chile, Denmark, Ireland, Korea, Luxemburg, Netherlands, New Zealand, the United Kingdom, and the United States) in at least one unit root test. We found the structuralist hypothesis in all 10 of these countries, whereas we could not find the natural-rate hypothesis.","PeriodicalId":159872,"journal":{"name":"Ekonometride Güncel Yöntemler ve Uygulamalar","volume":"28 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134369440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Investigation Into the Relationship Between the Supply and Demand and Price of Ethereum: An ARDL Bounds Test Approach","authors":"Çiğdem YILMAZ ÖZSOY","doi":"10.26650/b/ss10.2021.013.03","DOIUrl":"https://doi.org/10.26650/b/ss10.2021.013.03","url":null,"abstract":"","PeriodicalId":159872,"journal":{"name":"Ekonometride Güncel Yöntemler ve Uygulamalar","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126056438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}