ÖzElektronik ağızdan ağıza iletişim (eWOM), bireylerin çevrimiçi ortamda işletmeler, işletmelerin sunduğu ürün ve hizmetler hakkındaki duyguların ve düşüncelerin paylaşıldığı bir yapı olması nedeniyle önemli bir araştırma başlığı konumunu almıştır. Elektronik ağızdan ağıza iletişimin gerçekleştiği belli başlı platformlar arasında Twitter yer almaktadır. Ülkemizde ve dünyada yaygın olarak kullanılan mikro blog sistemleri arasında yer alan Twitter ile sermaye piyasalarının etkileşimi giderek artmaktadır. Pazarlama ve finansman konusunda yapılan araştırmaların arakesitinde yer alan başlık, araştırma konusu olarak seçilmiştir. Telekomünikasyon sektöründe yer alan, Borsa İstanbul'da hisseleri işlem gören firma üzerinden araştırma yürütülmüştür. Araştırma dönemi olarak 15.03.2017 ile 15.05.2017 tarihleri arasında Borsa İstanbul'da hisselerin işlem gördüğü günler seçilmiştir. Günlük olarak ilgili hissenin açılış ve kapanış değerleri elde edilmiş, açılış değeri kapanış değerlerinin farkı alınmış ve hisse hareket yönü o gün için negatif ya da pozitif olarak sınıflandırılmıştır. İlgili günler için twitter sayfasından bireylerin gönderdiği mesajlar üzerinden Duygu Analizi gerçekleştirilmiş, pozitif ve negatif olarak sınıflandırılmış, günlük duygu polaritesi değeri elde edilmiştir. Bu çalışmada duygu polarite değerleri ile hisse fiyatı hareketinin yönü arasında günlük bazda korelasyon analizi yapılmıştır. Elde edilen Spearman'nın sıra ilişkisi katsayısı değeri çerçevesinde iki veri seti arasında negatif ve orta düzeyde bir bağıntıya rastlanmıştır. A b s t r a c tPeople share their opinions and sentiments about companies, services and products on Internet. This makes Electronic Word of Mouth to be an important research topic in recent years. Twitter is one of the major platform for Electronic Word of Mouth. Interaction of capital markets with Twitter has been highly increasing, it has been selected as our research topic. Research has been carried out on the company, which has been operating in telecommunications industry and whose shares are traded in Borsa Istanbul. The research period is the dates between 15. 03.2017 and 15.05.2017. Daily opening and closing prices of the selected stock have been collected, daily raise and fall of the stock price has been classified accordingly. Sentiment analysis has been conducted for the same period and daily polarity values have been obtained. In this study, correlation analysis between public sentiment analysis and stock price movement direction is conducted. Spearman's rank correlation test was used. The obtained Spearman's rank correlation coefficient result showed, a negative and moderate correlation exists between daily changes in the company's stock prices with the public sentiments in tweets.

An increase in competition power provides more profitability by affecting the amount of production and export. By the increase in technology, innovation and R&D investments in recent ages in the world, high technology industries became even more important for competitive power. In this study, two analyses covering the data from 1995 to 2015 have been considered. In the first analysis, the competitiveness of the high-tech and low-tech sectors has been compared by using RCA index for selected countries. In the second analysis, the relationship between competition power and growth, total factor productivity and R&D expenditures have been analyzed by using GMM.

Today, employment is one of the most important issues of macroeconomics, which is closely related to all world economies. The first agenda item for employment is unemployment. According to its types, unemployment deeply affects developed or developing economies. Socialization of a society, increase in education level, technological progress and political structure are related to unemployment. In this research, the hysteresis effect of unemployment rates among young men and women in Turkey was studied by using monthly data between January 2014 and January 2022. Unemployment hysteria, which Blanchard and Summers discussed for the first time in 1986, is the situation in which unemployment rates rise in the face of shocks in the country's economies such as crises, natural disasters, pandemics etc. and unemployment rates do not return to their original state after the shock is over. By applying the Phillips Perron unit root test, which takes into account structural breaks in the research, it has been concluded that unemployment rates for young women have more hysteria than unemployment rates for young men. It is anticipated that this research will shed light on young women who want to participate in active working life in Turkey with the policies to be proposed.