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	Lector Universitar Dr. Roxana Ciumara
	Lista lucrari	
	    
	 
		
 
 

Teze doctorat T1. Analiza productivitatii si masurarea eficientei - (doctorat in Economie) finalizata in 2003, indrumator Prof. Dr. Gh. Boldur - Latescu, Academia de Studii Economice Bucuresti. T2. Recursive Evaluation of Moments, L-Moments and Empirical Bayes Estimation, with Applications in Insurance - (doctorat in Mathematica) finalizata in 2007, indrumator . Prof. Dr. V. Preda, Universitatea din Bucuresti, Facultatea de Matematica si Informatica. Lucrari publicate in reviste de specialitate Rn1. R. Ciumara - Convergence rates results for some empirical Bayes estimators. Proceedings of The 15th European Young Statistician Meeting, Castro Urdiales, Spain, September 10-14, 2007. Rn2. R. Ciumara, M. Beldiman - Estimation of the mean time to failure relative to a class of loss functions. Bulletin Mathematique, no. 4, 2007. Rn3. R. Ciumara - L-moments evaluation for identically and nonidentically distributed Weibull variables. Proceedings of Romanian Academy, no.4, 2007. Rn4. R. Ciumara - A Lower Bound for the Measure of Performance of an Empirical Bayes Estimator under a Weighted Squared-Error Loss and an Uniform Prior. Mathematical Reports, vol 9(59), no.3, 2007, pp. 257-266, cod CNCSIS 694, ISSN 1582-3067. Rn5. V. Preda, R. Ciumara - Convergence Rates in Empirical Bayes Problems with a Weighted Squared-Error Loss. Pareto Distribution Case. Revue Roumain de Math. Pur. et Appl., no. 6, 2007, pp. 673-682, ISSN 0035-3965. Rn6. L. Badin, R. Ciumara - Stochastic Frontier Estimation Using Simulated Annealing. Economic Computation and Economic Cybernetics Studies and Research, vol 40, no. 3 { 4, 2006, cod CNCSIS 332, ISSN 0424-267X. Rn7. V. Preda, R. Ciumara - On composite models: Weibull - Pareto and lognormal -Pareto. A comparative study. Romanian Journal of Economic Forecasting, no. 2, pp. 11 { 32, 2006, cod CNCSIS 120, ISSN 1222 - 5436. Rn8. R. Ciumara - An actuarial model based on composite Weibull-Pareto distribution. Mathematical Reports, vol 8(58), no.4, pp. 401 - 414, 2006, cod CNCSIS 694, ISSN 1582-3067. Rn9. R. Ciumara - Bayesian premium and asymptotic approximation for a class of loss functions. Proceedings of Romanian Academy, vol 6, nr 3, pp. 193-200, 2005, ISSN 1454-9069. Rn10. R. Ciumara - On ascending and descending factorial moments of compound mixed truncated Poisson distribution. Mathematical Reports, vol. 7(57), nr 3, pp. 179-198, 2005, cod CNCSIS 694, ISSN 1582-3067. Rn11. R. Ciumara - A Bayesian Approach for the Collective Risk Model Involving Weighted Quadratic Loss Function. Mathematical Reports, vol 7 (57), no.1, pp. 21-38, 2005, cod CNCSIS 694, ISSN 1582-3067. Rn12. R. Ciumara - The Moments and Descending Factorial Moments of Compound Mixed Truncated Poisson Distribution. Mathematical Reports, vol 6 (56), no.1, pp.21-44, 2004, cod CNCSIS 694, ISSN 1582-3067. Rn13. V. Burlacu, Gh. Cenusa, R. Ciumara - Suficient conditions for the existence of adjustment coefficient. Economic Computation and Economic Cybernetics Studies and Research (Romanian version), no. 2, pp. 25-38, 2003, cod CNCSIS 333, ISSN 0585-7511. Rn14. L. Spircu, R. Ciumara, A. Galupa - Efficiency measurement in under graduate education in Romania by using DEA. Economic Computation and Economic Cybernetics Studies and Research (Romanian version) no. 2, pp. 55-70, 2003, cod CNCSIS 333, ISSN 0585-7511. Rn15. C. Scutaru, M. Iordan, D. Marin, S. Stancu, R. Ciumara, P. Fomin - Annual and medium-term analysis and forecasts based on "Dobrescu" macromodel of the Romanian economy. Romanian Journal of Economic Forecasting, suplement, pp.17 - 24, 2003, cod CNCSIS 120, ISSN 1222 - 5436. Rn16. V. Burlacu, Gh. Cenusa, R. Ciumara - The stochastic aspect of bond loans. Economic Computation and Economic Cybernetics Studies and Research (Romanian version) no. 2, pp. 31-48, 2002, cod CNCSIS 333, ISSN 0585-7511. Rn17. L. Spircu, R. Ciumara - Efficiency Analysis of Some Romanian Decision Making Units. Revista Romana de Statistica 3, pp. 31 - 52, 2000. Carti si manuale universitare Ca1. V. Stefanescu, S. Dedu. F. Serban, R. Ciumara - Matematici pentru economisti (vol. I). Ed. Didactica si Pedagogica (cod CNCSIS 165), Bucuressti, 300 pagini, 2004, ISBN: 973-30-1060-X. Ca2. V. Stefanescu, S. Dedu. F. Serban, R. Ciumara - Matematici pentru economisti (vol. II). Ed. Didactica si Pedagogica (cod CNCSIS 165), Bucuresti, 250 pagini, 2004, ISBN: 973-30-1072-3. Ca3. F. Mustata, R. Ciumara, S. Gramatovici - Culegere de probleme de cercetari operationale. Editura ASE (cod CNCSIS 105), Bucuresti, 369 pagini,2003, ISBN 973-594-370-0. Cb1. V. Burlacu, Gh. Cenusa, R. Ciumara - Matematici financiare si actuariale. Teorie si practica. Ed. CISON (cod CNCSIS 173), Bucuresti, 200 pagini, Octombrie 2006. Cb2. L. Spircu, L. Badin, R. Ciumara, D. Mitrut - Eficienta si Productivitate. Tehnici de masurare , software si aplicatii economice. Ed. Economica (cod CNCSIS 67), 200 pagini, 2001, ISBN 973-590-421-7. Cb3. Studierea eficientei firmelor romanesti din industria berii in perioda 1994-1998 - capitolul 5 din Economii Cantitative, autori: D. Marin, L. Spircu, Editura Independenta Economia (cod CNCSIS 204), 2001. Cb4. L. Spircu, R. Ciumara - Econometrie - Ed. Pro Universitaria, 232 pagini, Decembrie 2007, ISBN 978-973-129-149-9. Lucrari prezentate la conferinte 1. R. Ciumara - Convergence rates results for some empirical Bayes estimators. The 15th European Young Statistician Meeting, Castro Urdiales, Spain, September 10-14, 2007 2. R. Ciumara, V. Preda - Efficient and almost eficient portfolios by scalarization. Euro XXII Conference on Operational Research, Prague, July 8-11, 2007. 3. V. Preda, R. Ciumara - On empirical Bayes estimators under some types of loss functions. The 6th Congress of Romanian Mathematicians, June 28 - July 4, Bucharest, 2007. 4. V. Preda, R. Ciumara - Some estimator of Poisson mean under threeparts balanced loss function. The 10th Conference of Probability and Statistics Society of Romania (SPSR), Academy of Economic Studies, 13 - 14 April 2007. 5. R. Ciumara - On L-moments evaluation for a class of probability distribution. The 10th Conference of Probability and Statistics Society of Romania (SPSR), Academy of Economic Studies, 13 - 14 April 2007. 6. L. Spircu, Crisan Albu, I. Gh. Rosca, A. Galupa, R. Ciumara, S. Spataru - Defining inputs and outputs in the educational environment. Tthe XIIth International Conference on Economic Cybernetics, ASE Bucharest, 2 - 4 November, 2006. 7. L. Spircu, R. Ciumara - Ranking facultiesí activities using univariate and multivariate statistical techniques. The XIIth International Conference on Economic Cybernetics, ASE Bucharest, 2 - 4 November, 2006. 8. V. Preda, R. Ciumara - Some Convergence Rates for Empirical Bayes Estimation of the Scale Parameter in a Pareto Distribution under a Weighted Squared - Error Loss. 8-ieme Colloque Franco-Roumain de Mathematiques Appliquees, France, Chambery 28 August- 2 September, 2006. 9. R. Ciumara, V. Preda, M. Beldiman - On Weighted Balanced Loss Function and Estimation of the Mean Time to Failure. 8-ieme Colloque Franco-Roumain deMathematiques Appliquees, France, Chambery 28 August- 2 September, 2006. 10. R. Ciumara - A comparison between two actuarial composite models: Weibull-Pareto and lognormal-Pareto . The 9th Conference of Probability and Statistics Society of Romania (SPSR), University of Bucharest, 28 - 29 April 2006. 11. R. Ciumara - On Bayesian Premium Approximation for a Class of Loss Functions. The 7th Balkan Conference on Operational Research, Constanta, 25 -28 May 2005. 12. R. Ciumara - An Asymptotic Approximation of Bayesian Premium when the Loss function is Weighted Quadratic. Th 8th Conference of Probability and Statistics Society of Romania (SPSR), University of Bucharest, 21 -22 April 2005. 13. R. Ciumara, D. Marinescu - Using Indirect Distance Functions in Evaluating Technical Efficiency. The IXth International Conference on Economic Cybernetics, ASE Bucuresti, 22 { 24 April, 2004. 14. R. Ciumara - A Bayesian Approach for the Collective Risk Model Involving Weighted Quadratic Loss Function. The 7th Conference of Probability and Statistics Society of Romania (SPSR), University of Bucharest, 20 -21 February 2004. 15. R. Ciumara, V. Preda - The Descending Factorial Moments of Compound Mixed Truncated Poisson Distribution. A 25th Conference of Probability and Statistics Society of Romania (SPSR), University of Bucharest, February 2003. 16. R. Ciumara - Efficiency of highschools from Bucharest. A parametric Approach. International Conference on Cybernetics, Academy of Economic Studies Bucharest, October 2002. 17. L. Spircu, R. Ciumara, A. Galupa - Efficiency in Romanian Public Undergraduate Education. Non-parametric approach. The 1st Central-East European Conference on Efficiency and Productivity, ASE, Bucharest, June 2002. 18. L. Badin, R. Ciumara - Stochastic Frontier Estimation Using Simulated Annealing. The 7th European Workshop on Efficiency and Productivity, Oviedo, Spain, September 2001. 19. L. Badin, R. Ciumara - Efficiency and Productivity Mmeasurement in Frontier models. International Symposium in Informatics, ASE Bucharest, May 2001. 20. I. Ghizdeanu, T. Bria, R. Ciumara - Some comments on analysis and estimation of macroeconomic efficiency using DEA models. Scientic Seminar TRANSITION AND INTEGRATION: THE PROSPECTIV MEASURE AT THE BEGINNING OF A NEW MILLENIUM, section I-a - Macroeconomic modeling, Bucharest, 14-15 December 2000. 21. R. Ciumara, I. Ghizdeanu, T. Bria - Quarterly forecasting of industrial production and gross domestic product using ARIMA models. Seminar TRANSITION AND INTEGRATION: THE PROSPECTIV MEASURE AT THE BEGINNING OF A NEW MILLENIUM, section I-a - Macroeconomic modeling, Bucharest, 14-15 December 2000.