Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7148

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Author: search.filters.author.Duran,H.E.

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  • Article
    Citation - Scopus: 11
    Non-Linear Regional Income Divergence and Policies: Turkey Case
    (Hellenic Association of Regional Scientists, 2015) Duran,H.E.
    The literature on economic convergence is strongly influenced by Neo-Classical Growth model. It describes a monotone saddle path along which each economy converges towards a unique steady state. Commonly employed method in convergence analysis is the linear cross-sectional regressions which links the annual growth rate of regions to their initial income level. Ignoring the non-linearities is important from a policy perspective that implications obtained from a linear regression can be very different to the policies learned from a nonlinear case. Aim of the present study is to analyze regional income convergence in Turkey by using nonparametric convergence regressions. We implement our study for 67 provinces and a period 1975-2000. We find that the relationship between initial income and growth takes a inverted-U shape which means that the very low-income and high-income group of provinces experince a slow growth pattern compared to middle-income group. This has several implications for regional economic policies. First, middle-income provinces are able to stimulate their economies and fulfill their potential for convergence by market forces. Second, however, the very low-income provinces need a substantial help and assistance.It, therefore, becomes a natural necessity to direct policy instruments such as subsidies, direct and indirect income transfers, tax exemptions and other resources to these areas. In this way, nonparametric estimations provide a very useful guide to the way how the resources should be allocated across provinces. © 2015 Hellenic Association of Regional Scientists. All rights reserved.
  • Article
    Citation - WoS: 1
    Citation - Scopus: 1
    Archaeometric Study of Roman Bricks and Cocciopesto Aggregates From the Ancient City of Nysa, Western Anatolia
    (Elsevier Ltd, 2024) Uğurlu Sağın,E.; Duran,H.E.; Böke,H.
    The aim of this study is to identify the similarities and differences in the raw material properties and manufacturing processes of the building bricks and cocciopesto aggregates present in the lime mortars and plasters from the ancient city of Nysa. For this purpose, X-ray diffraction, Fourier transformed infrared spectroscopy, X-ray fluorescence spectroscopy, scanning electron microscopy coupled with energy dispersive spectroscopy, and thermogravimetric analysis were used to determine their pozzolanic activities, chemical and mineralogical compositions, and microstructural properties. The XRF results were evaluated to determine differences in the chemical composition of the building bricks and cocciopesto aggregates using empirical statistical analyses. Analyses included descriptive statistics, scatter plots, and hierarchical clustering. The bricks were only partially sintered and did not contain high temperature products such as mullite, indicating moderate firing temperatures (<900 °C). The cocciopesto aggregates used in the mortars exhibit good pozzolanicity, unlike the building bricks, mainly due to their higher content of amorphous products. This suggests that pozzolanic cocciopesto aggregates were intentionally produced for the purpose of obtaining hydraulic mortars. The significant statistical differences in major oxide and trace element compositions suggest that the use of raw materials with different chemical compositions in the production of bricks and aggregates. The results reveal that pozzolanic cocciopesto aggregates were intentionally manufactured differently to building bricks to create hydraulic lime mortars. © 2024 Elsevier Ltd