Ricardo Mora - Academia.edu (original) (raw)

Papers by Ricardo Mora

We estimate conditional duration models to analyse recovery pro-cesses in emerging market economi... more We estimate conditional duration models to analyse recovery pro-cesses in emerging market economies. Our reduced form speci¯cation is parsimonious, as we focus on the e®ect of growth in the US, EU, and Japan on the prospects for recovery in emerging market economies experiencing recessions. In order to assess the robustness and forecast-ing capability of our results, we performed out-of-sample predictions using recently available data pertaining to the economies hit by the Asian crisis. The model successfully predicts the bouncing back of most emerging market economies hit by the Asian crisis, and con¯rms the importance of external factors in recovery processes.

Statistical Software Components, 2018

crtrees performs Classification and Regression Trees (see Breiman et al. 1984). The procedure con... more crtrees performs Classification and Regression Trees (see Breiman et al. 1984). The procedure consists of three algorithms: tree-growing, tree-pruning, and finding the honest tree.

This paper studies the wage gap between third-generation Mexican American and non-Hispanic white ... more This paper studies the wage gap between third-generation Mexican American and non-Hispanic white workers in the South-West. I develop a generalized version of Oaxaca wage gap decompositions that can be applied to nomparametric and semiparametric tree structures. The best model in terms of the test sample mean square error is the nomparametric one. This model assigns most of the observed wage gap to three equally important effects: selection bias in the sample, ethnic segregation, and workers' characteristics.

Dialogia

El presente artículo se dirige a analizar algunas condiciones de desigualdad estudiantes indígen... more El presente artículo se dirige a analizar algunas condiciones de desigualdad estudiantes indígenas en el marco de la pandemia ocasionada por el COVID-19 en una universidad pública estatal en México. Se presenta algunos datos del contexto para problematizar sobre dichas desigualdades. A partir de ello se contruyen 3 categorías analíticas para conocer las condiciones de los estudiantes: condiciones generales, condiciones de acceso y condiciones subjetivas. Los datos se obtuvieron a través de un cuestionario que respondieron 104,141 estudiantes de los cuales 968 se autodefinieron como pertenecientes a un pueblo indígena. El estudio muestra las profundas desigualdades que afectan a las minorías étnicas que se intertan como estudiantes a la educación superior, desigualdades que se agravaron en el periodo de la pandemia.

The core assumption to identify the treatment effect in difference-indifferences estimators is th... more The core assumption to identify the treatment effect in difference-indifferences estimators is the so-called Parallel Paths assumption, namely that the average change in outcome for the treated in the absence of treatment equals the average change in outcome for the non-treated. We define a family of alternative Parallel assumptions and show for a number of frequently used empirical specifications which parameters of the model identify the treatment effect under the alternative Parallel assumptions. We further propose a fully flexible model which has two desirable features not present in the usual econometric specifications implemented in applied research. First, it allows for flexible dynamics and for testing restrictions on these dynamics. Second, it does not impose equivalence between alternative Parallel assumptions. We illustrate the usefulness of our approach by revising the results of several recent papers in which the difference-indifferences technique has been applied.

Fabula Revista Literaria, 1998

Statistical Software Components, 2014

Southern Medical Journal, 1986

Kaposi's sarcoma is a multicentric, malignant, neoplastic process that manifests itself a... more Kaposi's sarcoma is a multicentric, malignant, neoplastic process that manifests itself as multiple vascular tumors. We present a comparative, retrospective analysis of demographic and survival data involving patients with Kaposi's sarcoma seen at Charity Hospital, New Orleans, over a 35-year period. The proportion of blacks and women is significantly higher than previously reported. Both blacks and men suffered relatively greater morbidity. In addition, the incidence of second primary malignancies in this group of patients is lower than previously reported.

Regional Science and Urban Economics, 2004

This paper analyzes the evolution of agricultural product specialisation at the farm and county l... more This paper analyzes the evolution of agricultural product specialisation at the farm and county levels in Spain from 1979 to 1997. This period covers all the stages of the gradual implementation of the Common Agricultural Policy and the integration of the Spanish agriculture into the European Market. A multiple product version of Theil and Finizza's indices of segregation is used to decompose farm product specialisation into county specialisation with respect to the national level and farm specialisation within counties. Using a probit specification, we test whether changes in specialisation are driven by comparative advantage at regional level or have been policy induced. Our results confirm the existence of increasing county specialisation and highlight the fact that counties which were initially more specialised in export oriented products have shown the largest increase in specialisation.

Journal of the American Academy of Dermatology, 1981

Cancer of the skin, in general, is believed to be rather uncommon in black persons. Information f... more Cancer of the skin, in general, is believed to be rather uncommon in black persons. Information from the Tumor Registry of Charity Hospital of Louisiana in New Orleans was reviewed in reference to black patients who were diagnosed as having squamous cell carcinoma (SCC) of the skin between 1948 and 1979. During this period, 163 black patients had a total of 176 SCCs of the skin. The lesions were about 20% more common than basal cell carcinomas (BCCs) in blacks of the same patient population. A mortality of 18.4% was a significant finding. The most common sites of involvement were the face and the lower extremity. Collectively, involvement of the non-sun-exposed areas was more common. The most common predisposing conditions were scarring processes.

European Economic Review, 2005

We estimate conditional duration models to analyse recovery processes in emerging market economie... more We estimate conditional duration models to analyse recovery processes in emerging market economies. Our reduced fonn specification is parsimonious, as we focus on the effect of growth in the US, EU, and Japan on the prospects for recovery in emerging market economies experiencing recessions. In order to assess the robustness and forecasting capability of our results, we perfonned out-of-sample predictions using recently available data pertaining to the economies hit by the Asis crisis. The model successfully predicts the bouncing back of most emerging market economies hit by the Asian crisis, and confinns the importance of external factor in recovery processes.

Cornea, 2007

To report the unusual presentation of bilateral Schwalbe rings suspended in the anterior chambers... more To report the unusual presentation of bilateral Schwalbe rings suspended in the anterior chambers of a patient with Axenfeld-Rieger syndrome. A 37-year-old man with bilateral decreasing visual acuity underwent slit-lamp examination, dark room gonioscopy, and photographic documentation. Prominent bilateral Schwalbe rings and peripheral iridocorneal strands were observed in both anterior chambers. No systemic abnormalities were found. The position of the Schwalbe ring in patients with Axenfeld-Rieger syndrome can vary in appearance from almost normal to displaced markedly. It remains to be seen whether these variations reflect genetic differences.

In the context of educational segregation by ethnic group, it has been argued that rigorous pair ... more In the context of educational segregation by ethnic group, it has been argued that rigorous pair wise segregation comparisons over time or across space should be invariant in two situations: when the ethnic composition of the population changes while the distribution of each ethnic group over the schools remains constant (invariance 1), or when the size distribution of schools changes while the ethnic composition of each school remains constant (invariance 2). This paper makes three contributions to this literature. First, it presents a testing strategy for choosing between the two properties. Second, it argues that both properties have strong implications, and that there are reasons to defend that the overall segregation index need not satisfy either one. In particular, the contrast between invariant segregation indices and the Mutual Information segregation index that violates both properties is illustrated with a number of examples. Third, nevertheless, it is shown that pair wise segregation comparisons using this index can be expressed in terms of (i) changes in the ethnic composition of the population, (ii) changes in the school size distribution, and (iii) changes in a third term that is invariant 1 or invariant 2. These decompositions can be used to reach the analogous ones obtained in Deutsch et al. (2006).

Journal of Applied …, 2005

Documentos de trabajo. Economic series (Universidad Carlos III. Departamento de Economía), 2001

We analyze the role of formal and informal information gathering in students' preference formatio... more We analyze the role of formal and informal information gathering in students' preference formation. We analyzed this role in the college admission process using Spanish individual data. We introduce students' risk aversion and information costs on the standard college admission problem. Then, we model the students' list formation as a two-stage procedure. In first stage, students must decide whether they gather information or not about a college. In the second stage, they give their preferred list to the matching office. The observed changes in preferences suggest that information gathering is important in the last two months of the process and that students with less ex-ante information are more affected by these changes.