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Foreign direct investment (FDI) is an important element in development of economic power with regard to growth. FDI is an efficient tool to transfer new technologies, managerial skills, knowledge, capital flow and so on. On the other hand, exportation is another means to integrate the economy of a country with that of the world and secure economic growth as well enhancing economic advantages.In this article, we attempt to research the relationship between FDI and export. The article begins with the definition of FDI theory, explains the motives fostering FDI, FDI and Turkey, FDI and export relation theoretically, and concludes with an empirical analysis of FDI and export in Turkey.The empirical research investigates the relationship between export and FDI by using monthly time series data for the Turkish economy over the period from December 1991 to October 2010. The study applies of the following econometric techniques: unit root test, Johansen cointegration test, vector error correction model (VECM), and Granger causality test. The cointegration analysis suggests long-run equilibrium relationship between the examined variables. The results of the Granger causality test showed a causal relationship between these variables. The causality results are consistent with the results reported by the vector error correction model (VECM).

Turkey is rapidly growing in terms of both its economy and its population. In parallel, its demand for energy is increasing fast. Energy is one of Turkey's most important development priorities. Today, Turkey's economy is mainly dependent on oil, natural gas, coal, and electricity. Turkey's energy production meets only a part of its total energy consumption and thereby is an energy-importing country. On the other hand, Turkey has a large potential for renewable energies. The most important renewable sources for Turkey's energy sector are wind, biomass, hydro, solar and geothermal. Renewable energy sources respond to the process of the trio of energy, economy, and environment because, as a local source it has many positive effects on employment and provides momentum to the economy of the country. Turkey would have to commit to the development and implementation of renewable energy technologies and energy conservation. The implementation of renewable energy technologies would reduce the current national and global environmental problems as well as national energy insecurity associated with the production and use of fossil energies. Thus, the aim of this article is to present the energy situation and potential of the renewable energy sources in Turkey as well as associate these factors with the economy and business priorities.

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Introduction Isolated mediastinal and/or hilar lymphadenopathy (IMHL) has become an increasingly common finding as a result of the increased use of thoracic imaging modalities. Endobronchial ultrasound‐guided transbronchial needle aspiration (EBUS‐TBNA) is accepted as the first step diagnostic method in the differential diagnosis of IMHL. Objective To determine the diagnostic yield of the procedure and to analyze clinical and sonographic findings that can be used to differentiate the etiology of lymph node pathologies. Methods Patients who underwent EBUS‐TBNA procedure between March 2017 and March 2020 were included in this retrospective study. Demographic data, symptoms, comorbid diseases, and EBUS findings were obtained from the records of the patients. Results EBUS‐TBNA provided a diagnosis in 88 patients out of 120 patients (granulomatous diseases n = 54, malignant diseases n = 21, and anthracotic lymph nodes n = 13), and 32 patients had a negative EBUS‐TBNA. 22/32 negative EBUS‐TBNA samples were true negatives (reactive lymphadenopathy). The sensitivity of the procedure was 89.8% while negative predict value was 68.7%, diagnostic yield of 91.6%. Patients with reactive lymph nodes had significantly more comorbidities (77.3%–19.4%, p < .001) and a lower number of lymph node stations (1.6 ± 0.8–2.7 ± 0.9, p < .001). Patients with anthracotic lymph nodes were older and mostly consisted of females (11/13, p < .001). Conclusion EBUS‐TBNA has high‐diagnostic efficiency in the differential diagnosis of IMHL. The number and size of lymph node stations can provide useful information for differential diagnosis. Clinical follow‐up can be a more beneficial approach in patients with reactive and anthracotic lymph nodes before invasive sampling.