2nd Gretl Conference

Eng.Nicolaus Copernicus University, Faculty of Economic Sciences and Management, Department of Econometrics and Statistics and Toruń School of Banking are pleased to invite for  2^nd Gretl Conference held at The Faculty of Economic Sciences and Management of Nicolaus Copernicus University, between 16-17 June 2011, Toruń, Poland.

Tr.Nicolaus Kopernik Üniversitesi, İktisadi ve İdari Bilimler Fakültesi, Ekonometri ve İstatistik Bölümü ve Toruń Bankacılık Okulu 16-17 Haziran 2011 tarihleri arasında Nicalus Kopernik Universitesi, İktisadi ve İdari Bilimler Fakültesi, Toruń, Polonya'da yapılacak olan 2.Gretl konferansına davet etmekten memnuniyet duyar.

Major crisis still ahead, past one was minor/Büyük krizler hala önümüzde, geçen kriz küçüktü.

Eng.Senior Research Scholar at Yale University Immanuel Wallerstein believes that the real economic crisis is still up ahead. According to Wallerstein, last years collapse was its minor version. For further readings you can have a look to his offical web site http://www.iwallerstein.com

Tr.Yale Üniversitesinden Kıdemli Araştırmacısı Immanuel Wallerstein, gerçek ekonomik krizin hala önümüzde olduğuna inanıyor.Wallerstein'a göre son yılların çöküşü gerçek ekonomik krizin yalnızca küçük bir uyarlamasıydı. Daha ileri okumalar için http://www.iwallerstein.com resmi internet sitesine bakabilirsiniz.

Erratum For The 5th Edition Of William Greene's Econometric Analysis

In William Greene's favorite book "Econometric Analysis, 5e" , the ACF and PACF calculations reported for Table 20.1 were incorrect. Using the same data, i posted the true calculations to Mr.Greene. And Mr.Greene posted my corrections kindly on ERRATA and DISCUSSION web page of his book.

My Article "Application Of Maksimum Entropy In Portfolio Selection" is published in Journal of the School of Business Administration, Istanbul University

In this paper, mean-variance-skewness (MVS) model is proposed first for optimal portfolio selection from financial assets, and then mean-variance-skewness-entopy (MVSE) model by adding entropy measure is proposed in order to obtain well diversified portfolio. In MVS and MVSE, Pearson skewness measure which is robust and easy to calculate than traditional skewness measures is used. Both models are used in IMKB-30 for portfolio selection and the results are compared with Markowitz mean-variance (MV) model. It is showed that more efficient portfolios can be selected by MVS model than MV model.

R Graphics

One of R's strengths is the ease with which well-designed publication-quality plots can be produced, including mathematical symbols and formulae where needed. Great care has been taken over the defaults for the minor design choices in graphics, but the user retains full control.

A Special Report On Managing Information From Economist

Feb 25th 2010 | From The Economist print edition The article has a short section on technology used for such applications, including this on R: "A free programming language called R lets companies examine and present big data sets, and free software called Hadoop now allows ordinary PCs to analyse huge quantities of data that previously required a supercomputer. It does this by parcelling out the tasks to numerous computers at once. This saves time and money. For example, the New York Times a few years ago used cloud computing and Hadoop to convert over 400,000 scanned images from its archives, from 1851 to 1922. By harnessing the power of hundreds of computers, it was able to do the job in 36 hours." It's nice to see the open-source combination of Hadoop and R getting recognition as the engine behind many such large-scale problems in predictive modeling. The Economist: A different game

A Monte Carlo Simulation Program For Linear Regression Parameters Written In R

# a monte carlo simulation for regression parameters by baris altayligil
# deparment of economics/istanbul university 2010
x<-runif(1000,0,50) #random numbers from uniform distribution
u<-rnorm(1000,0,1) #random numbers from standart normal distribution
y<-5*x+5+u #generating y series
data<-cbind(x,y)
beta1<-c()
beta2<-c()
n<-100 #number of loop#
ksubset<-25 #length of subset#
for (i in 1:n){
datam<-data.frame(data[sample(100,ksubset),])
ols<-lm(y~x,data=datam)
beta1<-append(beta1,ols$coefficients[1])
beta2<-append(beta2,ols$coefficients[2])
}
mean(beta1)
mean(beta2)
par(mfrow=c(2,2))
plot(beta1,main=mean(beta1),type="b",xlab="number of loop",col="blue")
plot(beta2,main=mean(beta2),type="b",xlab="number of loop",col="red")
hist(beta1,freq=FALSE,col="blue")
hist(beta2,freq=FALSE,col="red")

Living Library

The Living Library works exactly like a normal library - readers come and borrow a 'book’ for a limited period of time. There is only one difference: the Books in the Living Library are human beings, and the Books and readers enter into a personal dialogue. The Books in the Living Library are people representing groups frequently confronted with prejudices and stereotypes, and who are often victims of discrimination or social exclusion. In this library, Books cannot only speak, but they are able to reply to the readers' questions, and the Books can even ask questions and learn themselves.

I.T.U. Graduate Program In Economics Friday Seminars/ İ.T.Ü. İktisat Yüksek Lisans Programı Cuma Seminerleri

Eng.I was invited as a speaker to Economics Seminars of I.T.U. Graduate Program in Economics. The seminar program continues from year 2004 to present. The academicians who are invited to these seminar programs are told to present their researches in the field of economics. In program i was especially invited to present an introduction to open source coded programs R and Gretl and their applications in economics. (Addition After The Presentation: The presentation and  the questions in the end were fine :))) It was a great honour for me to meet with Professor Dr. Ümit Şenesen, the head of program, and who translated "Basic of Econometrics, Damador Gujarati" with Professor Dr. Gülay Günlük Şenesen. Thanks to everyone in the organization.)

Tr.İ.T.Ü. Sosyal Bilimler Enstitüsü İktisat Programı İktisat Seminerlerine davet edildim. Seminer programı 2004 yılından beri devam ediyor. Seminer programına davet edilen akademisyenlerden iktisat alanında yaptıkları araştırmaları sunmaları isteniyor. Benden de özellikle açık kaynak kod kullanan R ve Gretl programlarının tanıtımı ve ekonomi uygulamaları hakkında bir sunum yapmam istendi. (Sunum Sonrası İlave: Sunum ve sonundaki sorular oldukça iyiydi :))) Program başkanı ve "Temel Ekonometri, Damador Gujarati" kitabını Profesör Dr. Gülay Günlük Şenesen ile birlikte çeviren Profesör Dr. Ümit Şenesen ile tanışmak benim için büyük bir onurdu. Organizasyonda emeği geçen herkese teşekkürler.)

İ.T.Ü. İKTİSAT YÜKSEK LİSANS PROGRAMI

CUMA SEMİNERLERİ

BAHAR 2010 DÖNEMİ

12.02.2010    Burak Uras, Washington University in St. Louis, Productive Entrepreneurship and Economic Development with Limited Contract Enforcement
19.02.2010    Barış Altaylıgil, İstanbul Üniversitesi, R ve Gretl Tanıtımı
26.02.2010    Sungur Savran, Yeni Bir Büyük Depresyon mu?
05.03.2010    Ozan Bakış, Galatasaray Üniversitesi,Occupational Choice and Redistributional Taxation
12.03.2010    İlker Dastan,Rutgers Uni., Labor Market Effects of Obesity,Smoking and Alcohol Use
19.03.2010    Kaya Ardıç, İstanbul Üniversitesi, İktisat Biliminde Yöntem Sorunları: İktisatçılar Nasıl Açıklıyorlar ve Neden Anlaşamıyorlar?
26.03.2010    Resul Aydemir, Kadir Has Universitesi, Threat of Entry and Low Cost Airline Competition
02.04.2010    Öğrenci sunumları  
09.04.2010    Öğrenci sunumları  
16.04.2010    Öğrenci sunumları  
23.04.2010    Ulusal Egemenlik ve Çocuk Bayramı 
30.04.2010    Devrim Dumludağ, Marmara Üniversitesi, The Quality of Institution in Multilateral Cooperation: The Political Economy of FDI in Turkey
07.05.2010    Sezgin Polat, Galatasaray Üniversitesi, Wage Income Mobility in Turkey
14.05.2010    Yahya Madra, Gettysburg College, Neoliberalism in Economics: A Gynealogy

Equations for Valentines

This Demonstration shows four different heart-shaped algebraic surfaces. You can improve the quality of the plots by increasing the "number of sample points" and "max recursion" settings but this will also increase the rendering time.