Turkay Yildiz

15 Questions 7 Answers 0 Followers

Questions related from Turkay Yildiz

Does your institution pay you in case you publish your research in some of the leading journals?

In Turkey, there is such a system of payment (awarding) for supporting researches published in some of the SCI/SSCI indexed journals. See the attachment. I would be happy to hear if there is such...

03 March 2014 7,399 37 View

What does unrestricted and restricted constant mean in VECM time series analysis?

When and why to choose unrestricted, restricted constant, or other options in that combobox? There is such a combobox option for selecting unrestricted and restricted constant in GRETL. From the...

12 December 2013 3,575 2 View

Which statistical analysis could be performed to measure the progress of countries' performances with few columns?

My data has only 3 columns. These columns are year_2012, year_2010, year_2007. These columns are about measurements performed in various years (2012, 2010, 2007). Rows are countries (~150...

12 December 2013 2,535 4 View

What is the use of "include a constant" in vector autoregression in time series analysis?

There is an option for including a constant in time series analysis in GRETL. Practically, why and when is it used for?

12 December 2013 6,927 0 View

Would you please tell me the common choice of fuel type in your country?

Gasoline and diesel fuel prices are high in many countries. For instance, in Turkey, the 97-octane gasoline is 2.45 US dollar per liter. The Euro-Diesel fuel is 2.23 US dollar per liter. 1 liter...

12 December 2013 6,125 15 View

Do you know any full feature proprietary software free for academic institutions, students, labs, etc.?

The software should not be a trial version. It should be proprietary software and its full features should be freely available for use in academic institutions. For instance, I know of a program...

12 December 2013 3,385 6 View

In factor analysis, is it safe to extract factors after knowing the correlation matrix is not positively definite and its determinant equals zero?

My purpose for using factor analysis is to obtain a small number of factors, which account for most of the variability in the 117 variables. I have extracted 16 factors. These 16 factors have...

11 November 2013 2,492 1 View

Which statistical methods should be used to test the distribution of a small or large sample?

In some cases, I encountered different results from some normality tests. For instance, in one of my samples, Shapiro–Wilk normality test indicated that my data varies significantly from a normal...

11 November 2013 6,731 15 View

Is there any alternative to the ridge regression method?

In my model, I experience a multicollinearity problem in least squares estimation. Therefore, I decided to use the ridge regression method. I examined the variance inflation factors (VIFs). In...

11 November 2013 3,209 4 View

Which statistical method should be used to investigate the relationship between two sets of numerical variables?

My data consist of two sets. First set has 6 numerical variables (columns) and the second set has 16 numerical variables (columns). These two sets have ~150 rows. Any suggestions?

11 November 2013 3,219 14 View

What are the underlying reasons for saving factor scores with different methods, as such Anderson-Rubin scores, Bartlett scores, etc?

In its final solution, factor analysis creates one new variable for each factor. These variables can be saved using methods namely Anderson-Rubin, Bartlett scores, regression, etc. I prefer...

11 November 2013 2,310 5 View

How would you interpret Multivariate Adaptive Regression Splines (MARSplines) results?

About the data Continuous dependents : v1, v2 Continuous independents : F1, F2, F3, F4 Independent variables F1 and F3 appear to have high importance. And next come F2, F4 variables. Would you...

11 November 2013 1,992 3 View

Will the manufacturing industry be safe with renewable energy?

In Germany, the renewable energy sources appear to send bad signals as pointed out by Holman in his article, and then what will be the solution for future energy demand? 11 November 2013, The...

11 November 2013 3,847 6 View

Why do renewable energy policies fail in Turkey and in many other countries?

Turkey will be building 50 to 86 coal plants and 3 nuclear power plants. November 4, 2013 - CEE Bankswatch Network: "Between 50 and 86 new coal plants are planned to be built in Turkey over the...

11 November 2013 5,576 5 View

What are the advantages and disadvantages of fully automated container terminals?

Fully automated container terminals are utilizing only unmanned terminal vehicles and using automatic stacking (AS) and retrieval systems (RS) for container storage, and many other automated...

11 November 2013 5,508 12 View