Person: Segovia González, María Manuela
Profesor/a Titular de Universidad
Universidad Pablo de Olavide
Economía, Métodos Cuantitativos e Historia Económica
Métodos Cuantitativos para la Economía y la Empresa
Now showing 1 - 7 of 7
PublicationOn centralized resource utilization and its reallocation by using DEA(Springer Link, 2014) Mar-Molinero, Cecilio; Prior, Diego; Segovia González, María Manuela; Portillo, FabiolaThe standard DEA model allows different DMU units to set their own priorities for the inputs and outputs that form part of the efficiency assessment. In the case of a centralized organization with many outlets, such as an education authority that is responsible for many schools, it may be more sensible to operate in the most efficient way, but under a common set of priorities for all DMUs. The algorithm that is used to do this, the centralized resource allocation model, does just this. We show that the centralized resource allocation model can be substantially simplified and we interpret the simplifications and show how the model works using real data of Spanish public schools. Apart from finding the best way to reallocate resource among the schools, it is shown that the most desirable operating unit is found to be a by-product of the estimation. This is useful information when planning new schools. PublicationValidation of a new scoring system: Rapid assessment faecal incontinence score.(Baishideng Publishing Group Inc, 2015) De la Portilla, Fernando; Calero-Lillo, Arantxa; Jimménez-Rodríguez, Rosa M; Reyes, María L; Segovia González, María Manuela; Maestre, María Victoria; García-Cabrera, Ana MAIM: To implement a quick and simple test - rapid assessment faecal incontinence score (RAFIS) and show its reliability and validity. METHODS: From March 2008 through March 2010, we evaluated a total of 261 consecutive patients, including 53 patients with faecal incontinence. Demographic and comorbidity information was collected. In a single visit, patients were administered the RAFIS. The results obtained with the new score were compared with those of both Wexner score and faecal incontinence quality of life scale (FIQL) questionnaire. The patient without influence of the surgeon completed the test. The role of surgeon was explaining the meaning of each section and how he had to fill. Reliability of the RAFIS score was measured using intra-observer agreement and Cronbach's alpha (internal consistency) coefficient. Multivariate analysis of the main components within the different scores was performed in order to determine whether all the scores measured the same factor and to conclude whether the information could be encompassed in a single factor. A sample size of 50 patients with faecal incontinence was estimated to be enough to detect a correlation of 0.55 or better at 5% level of significance with 80% power. RESULTS: We analysed the results obtained by 53 consecutive patients with faecal incontinence (median age 61.55 ± 12.49 years) in the three scoring systems. A total of 208 healthy volunteers (median age 58.41 ± 18.41 years) without faecal incontinence were included in the study as negative controls. Pearson’s correlation coefficient between "state" and “leaks” was excellent (r = 0.92, P < 0.005). Internal consistency in the comparison of “state” and “leaks” yielded also excellent correlation (Cronbach’s α = 0.93). Results in each score were compared using regression analysis and a correlation value of r = 0.98 was obtained with Wexner score. As regards FIQL questionnaire, the values of “r” for the different subscales of the questionnaire were: “lifestyle” r = -0.87, “coping/behaviour” r = -0.91, “depression” r = -0.36 and “embarrassment” r = -0.90, (P < 0.01). A multivariate analysis showed that all the scoring systems measured the same factor. A single factor may explain 80.84% of the variability of FI, so all the scoring systems measure the same factor. Patient’ s continence improves when RAFIS and Jorge-Wexner scores show low values and when the values obtained in the FIQL questionnaire are high. CONCLUSION: RAFIS is a valid and reliable tool to assess Faecal Incontinence. PublicationAn assessment of the efficiency of Spanish schools: evaluating the influence of the geographical, managerial, and socioeconomic features.(Wiley, 2020) Segovia González, María Manuela; Domínguez, Carlota; Contreras Rubio, IgnacioThe aim of the present paper is to explore the efficiency of Spanish schools while simultaneously considering data envelopment analysis (DEA) and multivariate analysis. Test scores from the Program for International Assessment reports are used as outputs while the resources of each institution are considered as inputs to the analysis. The methodology utilized determines the DEA efficiencies under various input/output combinations and the results are interpreted through the application of factor analysis and property-fitting techniques. The objective of the study is to identify the strengths and weaknesses of each type of school and the connections with the way in which the efficiency is obtained. In the light of the results, the study concludes that there exist differences related with two of the criteria considered: the type of management of the schools and the parental socioeconomic level of the students. However, no differences appear when the geographical location of the institutions is considered to characterize the entities. PublicationA multiplicative composite indicator to evaluate educational systems in OECD countries(Taylor & Francis Online, 2022) Dominguez-Gil, Carlota; Segovia González, María Manuela; Contreras Rubio, IgnacioIn the evaluation of any political strategy, it is essential to carry out the collection and analysis of the available data. The presentation of a complex phenomenon by means of synthetic measures can improve both the political actors’ understanding of the situation and the design of new measures. In this paper, we deal with the problem of the construction of a multidimensional composite indicator for the evaluation of educational systems in OECD countries. In our proposal, not only are those indicators included that measure the academic outcomes, but also a group of indicators that measures the social dimension of the educational system. A variation of a methodology based on Data Envelopment Analysis is developed to construct a composite multiplicative indicator that enables inter-temporal comparison and the detection of the sources of the variation. PublicationA Composite Indicator to Compare the Performance of Male and Female Students in Educational Systems(Springer, 2023) Segovia González, María Manuela; Contreras Rubio, IgnacioComposite indicators have proved to be a suitable tool for the evaluation of complex phenomena, by enabling a large amount of information to be concentrated in a unique value. In this paper, a methodology based on geometric aggregation and free-selection of weights is proposed for the evaluation of the educational systems of OECD countries. In an effort to carry out a global evaluation, not only is a group of indicators considered to measure the academic outcomes, but also a group of indicators that measure the social dimension of the educational system and the self-perceptions of the students regarding their academic stage. The features of the proposed methodology enable the results for male and female students to be compared separately, since not only identify the contribution of each aspect to the global indicator, but also ascertain the sources of the differences between the values obtained for the male and female subgroups. PublicationDiseases Associated with Long Term Care: A Preliminary Study to Help of Improving the Quality of Life of Dependents(Springer, 2014) Segovia González, María Manuela; Martín Caraballo, Ana M.; Herranz Peinado, Carmen Patricia; Guerrero, F.M.The average life expectancy of the population in developed countries has continued to rise since the middle of the last century. This phenomenon implies many changes in society, mainly social and economic. Although this constitutes both medical and technological step forward, many elderly people have limiting disabilities that may even render it impossible to perform activities of daily living. Consequently, a decline in quality of life is provoked and these people become dependent on long-term care. It remains crucial to determine those diseases that would involve major deterioration in the quality of life and a high cost of care. Hence the aim of this paper is to study which diseases are more closely associated to dependence in order to provide parameters and indicators to enable the implementation of policies of prevention, investment into research, and the development of viable strategies to cover the cost of medical care in the future. PublicationDiseases Associated with Long Term Care: A Preliminary Study to Help of Improving the Quality of Life of Dependents.(Springer, 2014) Segovia González, María Manuela; Martín Caraballo, Ana M.; Herranz Peinado, Carmen Patricia; Guerrero Casas, Flor MaríaThe average life expectancy of the population in developed countries has continued to rise since the middle of the last century. This phenomenon implies many changes in society, mainly social and economic. Although this constitutes both medical and technological step forward, many elderly people have limiting disabilities that may even render it impossible to perform activities of daily living. Consequently, a decline in quality of life is provoked and these people become dependent on long-term care. It remains crucial to determine those diseases that would involve major deterioration in the quality of life and a high cost of care. Hence the aim of this paper is to study which diseases are more closely associated to dependence in order to provide parameters and indicators to enable the implementation of policies of prevention, investment into research, and the development of viable strategies to cover the cost of medical care in the future.