Optimal Perturbation Iteration Method for Bratu-Type Problems

In this paper, we introduce the new optimal perturbation iteration method based on the perturbation iteration algorithms for the approximate solutions of nonlinear differential equations of many types. The proposed method is illustrated by studying Bratu-type equations. Our results show that only a few terms are required to obtain an approximate solution which is more accurate and efficient than many other methods in the literature.Comment: 11 pages, 3 Figure

The Market Performance of Initial Public Offerings in the Istanbul Stock Exchange

This study examines the long-standing IPO performance in the Istanbul Stock Exchange (ISE) by using new factors such as source of shares (new issue or sale of large shareholders), allocation of shares and dispersion of investors as well as existing factors such as market conditions (hot/cold), underwriters’ reputation, and firm characteristics (firm size, E/P, and B/M ratios) in the period of 1990-2000. Our results differ from the previous studies at least three ways. First, the magnitude of underpricing is significantly lower, while underperformance is higher than those of in other studies. Our strong evidence supports the existence of the underpricing by positive initial excess returns (5.94%) and the long-term underperformance up to three-year holding period (-84.5%) in the ISE. Second, underperformance starts much earlier than in other markets i.e. at the end of first month following the IPO because of myopic behavior of investors seeking short-term returns. Third, the underperformance disappears for IPOs made in a cold market, and those made through the sale of large shareholders. Allocation of shares in an IPO and firm size also impact after-market performance of sharesInitial Public Offerings, Underperformance, Underpricing, Market Efficiency, Emerging Markets

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Prens Sabahaddinin geride bıraktıkları:Doğumunda ebesine 100 altın lira bahşiş verilen çocuk

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Deniz Müzesi yarın törenle açılıyor

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Suda da hile!:Hamidiye suyuna terkos karıştırılıyor!

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Cevahir bedesteni eski esnafının iş hayatı:Karşılıklı itimat ve esnaf terbiyesi

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Taha Toros Arşivi, Dosya Adı: Prens Sabahattinİstanbul Kalkınma Ajansı (TR10/14/YEN/0033) İstanbul Development Agency (TR10/14/YEN/0033

Prof. Fuat Köprülü ile evinde bir konuşma...

Taha Toros Arşivi, Dosya No: 210-Köprülü Soyadlılar, Fuat Köprülü. Not: Gazetenin “Siyaset Adamlarımızın Hususi Hayatları: 10” köşesinde yayımlanmıştır.İstanbul Kalkınma Ajansı (TR10/14/YEN/0033) İstanbul Development Agency (TR10/14/YEN/0033