Vedat Ceyhan - Academia.edu (original) (raw)

Papers by Vedat Ceyhan

International Journal of Energy Sector Management, May 10, 2022

Purpose This study aims to empirically examine the relationship between energy consumption, agric... more Purpose This study aims to empirically examine the relationship between energy consumption, agricultural economic growth and globalization in Turkey by using data from 1980 to 2018. Design/methodology/approach The Lee-Strazicich LM breakpoint test was used to test the stationarity of the variables. The presence of the long-run relationship between the variables was examined by using the Maki cointegration test. The dynamic ordinary least squares method was used to estimate the long-run coefficients of the model. The direction of causalities was determined using the Toda–Yamamoto causality test. Findings Research results showed that consuming energy on average of 14,460 GJ/hectare has returned $1,612 agricultural gross domestic products (GDP)/hectare per year. Turkey’s energy consumption (EC), GDP and globalization index (GI) from 1980 to 2018 increased by 2-fold, 3-fold and 1.5-fold, respectively. Research results also showed that Turkey’s EC was affected by GI and GDP. Practical implications The study suggests using environmentally friendly energy inputs and conscious consumption to reach growth targets and to reduce the pressure of intensive energy use on natural resources. Further research is needed for exploring the causality and relationship between EC and GI and along with other variables in the agricultural sector. Originality/value The study contributes two contributions to the existing literature. The first contribution is to examine the neglected relationship between GI and EC and GDP in Turkey. The second is that the EC data for Turkish agriculture used in the study were calculated by the authors.

Journal of Agricultural Science and Technology, Feb 1, 2023

There have been serious problems in optimizing capacity management due to lacking detailed analys... more There have been serious problems in optimizing capacity management due to lacking detailed analysis of the current business model in Licensed Grain Warehouses (LGW) in Turkey. Therefore, the study's objectives were to economically analyze the standard and industrialist business models and examine the capacity management optimization in LGW in Turkey. Research data were collected from managers of warehouses by using semi-structured interviews and observations. Management records of the examined firms were also used to elicit warehouse-level data. MOTAD model was used to generate a capacity optimization plan under risky conditions. Research results showed that the capacity use ratio of two different business models was nearly the same, and both had smaller capacity use ratios than that of the optimum. Inventory turnover of the industrialist business model was higher than that of the standard one (P< 0.01). The amount of loss was lower than 1% in both business models. The gross income of the industrialist business model was larger compared to a standard business model. MOTAD programming results revealed that, with government incentives and support, optimizing the storage organization in the industrialist business model increased the gross revenue of licensed warehouses by 177.27%. Ensuring the optimum capacity management would reduce the need for working capital by 21.69%. The study suggests conversion from a standard business model to an industrialist one and controlling and monitoring inventory turnover to optimize the capacity of LGW.

Çankırı Karatekin Üniversitesi sosyal bilimler enstitüsü dergisi, Dec 1, 2013

AraĢtırmada ekmek üreten iĢletmelerin teknik etkinliğinin ölçülmesi amaçlanmıĢtır. Veriler, Samsu... more AraĢtırmada ekmek üreten iĢletmelerin teknik etkinliğinin ölçülmesi amaçlanmıĢtır. Veriler, Samsun ili Atakum ilçesinde faaliyette bulunan 23 fırından anketlerle temin edilmiĢtir. Fırınların etkinliği Stokastik sınır fonksiyonu yöntemi ile tahmin edilmiĢtir. AraĢtırma sonuçlarına göre iĢletmeler ortalama %76 oranında etkindir. Bu iĢletmeler girdi kullanımını %24 azaltarak tam etkin olabilecektir.

The purposes of the study focused on the relationship between innovation and sustainability were ... more The purposes of the study focused on the relationship between innovation and sustainability were to (i) measure the sustainability level and the level of benefiting from innovation in farms producing paddy in Bafra district of Samsun and (ii) explore the relationship between innovation and sustainability. The research data sources were farms producing paddy, previous studies related paddy, related institutions, view of academician and technical person in the research area and field observation. The farm level data covered the period of 2013 and collected from randomly selected 60 farms by using well-structured questionnaire. To measure economic, environmental and social sustainability, sustainability index was used while we used innovation index for exploring the level of benefiting innovation. Research results revealed that economic performance and innovation capacity of second group farms was better comparing to rest. Research results also showed that the sustainability was higher in farms that their benefiting level from innovation is high. Positive effects of innovation on sustainability were lower than of second and third ones. The study suggests initiating the farmers' education program based on farmers' need. For small scale farms that their benefiting level from innovation was low, financial and infra structure support may strength the relationship between innovation and sustainability.

Tarım ekonomisi dergisi, Jun 1, 2001

Turkish Journal of Fisheries and Aquatic Sciences, Dec 1, 2015

The structure of fishmeal and oil manufacturers and their challenges and opportunities in Turkey ... more The structure of fishmeal and oil manufacturers and their challenges and opportunities in Turkey was examined in this study. The research data was collected from both fishmeal and oil manufacturers (12) by using questionnaires and stakeholders of the industry via SWOT analysis. Research results showed that fishmeal and oil manufacturers produced 174 kg of fishmeal and 117 kg of fish oil by processing one ton of anchovy while that of sprat was 140kg and 40kg, respectively. Research results also showed that the strength of the fishmeal and oil sector were the short marketing channel and high profitability while the weaknesses were insufficient fish stock and difficulties in finding fish as a raw material. The most important opportunities and threats were the increasing demand for aquaculture and the lack of data about the stocks of anchovy and sprat, respectively. The four main problem areas in the sector are the difficulties in providing fish, the absence of an effective decision support system developed by using macro and micro level data, infrastructure problems and legislation issues. Contributions to the solution of the problems in this industry include the sustainable use of the fish stock in the Black Sea and increasing the amount of captured fish by focusing on international seas. In addition, designing an information system in the sector, the establishing of laboratories and the necessary facilities for compliance with the standards of food production, the implementation of filter systems for the odor problem, solving the electrical problems, and effective implementation of the legal regulations with the minimum height and catch quota, and the promotion of the qualifications of the managers may enhance the competitive power of the sector.

Ege Üniversitesi Ziraat Fakültesi Dergisi

Amaç: Günümüze kadar Türkiye’de besi sığırcılığı yatırım kararları, yeterli bilgi birikimi olmadı... more Amaç: Günümüze kadar Türkiye’de besi sığırcılığı yatırım kararları, yeterli bilgi birikimi olmadığından reel opsiyonlar göz ardı edilerek yatırımın değerini olduğundan daha düşük değerde gösteren geleneksel yöntemlerle alınmış ve bu yaklaşım bazen kabul edilmesi gereken yatırımların reddedilmesine yol açmıştır. Besi sığırcılığı yatırımlarında reel opsiyonların belirlenmesi, reel opsiyonlarının değerlemesinin yapılması ve reel opsiyonların değerinin yatırımı ekonomik olarak cazip kılmak açısından yeterli olup olmadığının ortaya konulması amaçlanmıştır. Materyal ve Yöntem: Araştırmada Türkiye’de 14 ilde faaliyet gösteren 385 işletmeden anket ve gözlem, ilgili kuruluşlardan ise bireysel mülakatla toplanan verilerle; TUİK, FAO, üretici birlikleri ve diğer kuruluşlardan sağlanan veriler kullanılmıştır. Reel opsiyonların değerlemesi binomiyal ve monte carlo simülasyonu yöntemleriyle yapılmıştır. Araştırma Bulguları: Araştırma sonuçları Türkiye’de net bugünkü değeri -1.79 milyon ₺ olan 150...

Journal of Cleaner Production

The Rapa whelk (Rapana venosa), which entered the Black Sea as an invader, has become a commercia... more The Rapa whelk (Rapana venosa), which entered the Black Sea as an invader, has become a commercial stock and has brought many problems in its management since the 1980s. This research aimed to get a detailed idea about the views of the stakeholders of the Rapa whelk sector and to develop concrete and applicable suggestions for the sustainability of the sector. For this, first of all, all stakeholder groups were brought together and their opinions were taken. Afterward, the management measure suggestions collected from the group were evaluated by everyone through questionnaires. When the general opinions of the stakeholders were evaluated, it was seen that most of the beam trawlers argued that legal restrictions should be softened to be able to fish more while academicians and representatives of environmental organizations stated that environmentally friendly fishing gear should be designed and used to protect the marine ecosystem. The policymakers participating in the workshop think...

Ege Journal of Fisheries and Aquatic Sciences

There has been a significant lack of data on product and input markets, aquaculture consumption c... more There has been a significant lack of data on product and input markets, aquaculture consumption characteristics, production, distribution and marketing issues, and supply and value chain in Turkish fishing and aquaculture sectors. Therefore, the study examined the competitiveness of the Turkish aquaculture industry. Time series data belonging the time period of 1976-2020 gathered from Food and Agriculture Organization (FAO), World Trade Organization and Turkish Statistical Institute (TURKSTAT) were used in the study. In the research, the competitiveness of the Turkish fishing and aquaculture sector has been explored by using the Balassa index, total factor productivity and production costs. The research results show that the fisheries in Turkey are small-scale, technological level are insufficient and there are financial problems. Based on the revealed comparative advantage (RCA) values of the world and EU, which are 0.65 and 1.86, respectively, Turkey 's has competitive power o...

WOS: 000433051500016In recent years, eco-friendly practices have gained importance in agricultura... more WOS: 000433051500016In recent years, eco-friendly practices have gained importance in agricultural production. Therefore, the aims of the study were to estimate the efficiency measures of participant and non-participant to the Environmentally Friendly Agricultural Land Protection Program (EFALP) in Samsun province of Turkey, to determine the effects of participating the program on the farm level production efficiency and to calculate the opportunity cost of conversion to eco-friendly farming system in Samsun provinces of Turkey. The bulk of the data were collected from randomly selected 133 farms and cluster analysis was performed to select similar farms. Data Envelopment Analysis (DEA) was used to estimate efficiency scores. Opportunity cost of conversion was calculated by comparing the net revenue of eco-friendly farming system and conventional one. Research results showed that the mean technical, allocative and cost efficiencies of participant farms were lower than non-participan...

Araştırmada, üç farklı üniversiteye bağlı Meslek yüksekokullarında etkinliklerin ölçülmesi amaçla... more Araştırmada, üç farklı üniversiteye bağlı Meslek yüksekokullarında etkinliklerin ölçülmesi amaçlanmıştır. Etkinlik analizi, girdiye yönelik Veri Zarflama Yöntemi kullanılarak yapılmıştır. Araştırmanın girdileri, program sayısı, derslik sayısı, bütçe (TL), öğretim elemanı sayısı, eğitim alanı (m2), idari personel sayısı, öğretim elemanlarına ait bilgisayar sayısı, öğrencilere ait bilgisayar sayısı ve kayıtlı öğrenci sayısıdır. Çıktıları ise mezun öğrenci sayıları, öğrencilerin mezuniyet not ortalaması ve öğretim elemanları tarafından yapılan bilimsel makale sayısıdır. Araştırma sonuçları MYO’ların %67’sinin etkin çalıştıklarını ortaya koymuştur. MYO’lar etkinlik sağlamak için girdi azaltmak yerine çıktıları arttırmalıdırlar.Inthepresentstudy, it wasaimedtomeasure of efficiencies of vocationalschools of threedifferentuniversities. Efficiencyanalysiswasperformedusinginputorienteddataenvelopmentanalysis. Inputswereused in thestudywerenumber of departments, number of classrooms, budget (...

Ondokuz Mayıs Üniversitesi Ziraat Fakültesi Dergisi (. Anadolu Tarım Bilimleri Dergisi), 2001

Ziraat mühendisliği, Jul 1, 2009

Ondokuz Mayıs Üniversitesi Ziraat Fakültesi Dergisi (. Anadolu Tarım Bilimleri Dergisi), 2002

The aims of the study were to estimate the efficiency measures of dry apricot farms in Malatya pr... more The aims of the study were to estimate the efficiency measures of dry apricot farms in Malatya province of Turkey and to explore determinants of cost inefficiency. Data Envelopment Analysis (DEA) was used to measure efficiencies. Data used in the study was obtained from 97 farms selected by stratified random sampling method. Research results showed that in the first group, the mean technical, allocative and cost efficiencies for sample farms were measured to be 0.738, 0.760 and 0.558, respectively. In the second group, they were 0.905, 0.762 and 0.697, respectively. Efficiency scores revealed that inefficient farms in both farm size groups might reduce the production costs by 30.3% and 44.2%, respectively. Based on the results of the decomposition of the technical efficiency, pure technical inefficiency was the primary cause of technical inefficiency in both groups. Research results also showed that the education level of farm head and non-farm income influenced the cost inefficienc...

Bu arastirmanin amaci, ulkemizdeki tarim makinesi imalatcilarinin guvenli tarim makineleri imalat... more Bu arastirmanin amaci, ulkemizdeki tarim makinesi imalatcilarinin guvenli tarim makineleri imalati ile ilgili mevcut durumlarini ve egitim ihtiyaclarini belirlemektir. Bu amacla cogunlugu imalatcilardan olusan deneklerle yuz yuze anketler yapilmis ve konuyla iliskili olarak imalatcilarin durumlari ile egitim ihtiyaclari ortaya konulmaya calisilmistir. Yapilan degerlendirmeler isiginda sektor ihtiyaclarini karsilamaya yonelik oneriler getirmeye calisilmistir. Tarimda calisanlar tarafindan kullanilacak her turlu urun/makine/sistemin kabul gormus guvenlik standartlari icerisinde tasarlanmasi ve uretilmesinin saglanmasi gerekmektedir. Bu nedenle 2006/42/AT Makine Emniyeti Yonetmeligi'nin tam olarak uygulamaya konulmasi kritik bir oneme sahiptir. Bu gerekliligin yerine getirilmesinde en onemli unsurlardan biri imalatcilarin guvenli urun imalati konusunda bilgi ve becerinin gelistirilmesi olarak karsimiza cikmaktadir.