Miguel Sanchez - Academia.edu (original) (raw)

Papers by Miguel Sanchez

Vienna Yearbook of Population Research, 2022

In this article, we investigate the effect of demography on wealth inequality. We propose an econ... more In this article, we investigate the effect of demography on wealth inequality. We propose an economic growth model with overlapping generations in which individuals are altruistic towards their children and differ with respect to the age of their parent. We denote the age gap between the parent and their child as generational gap. The introduction of the generational gap allows us to analyze wealth inequality not only across cohorts but also within cohorts. Our model predicts that a decline in fertility raises wealth inequality within cohorts and, simultaneously, it reduces inequality at the population level (across cohorts). In contrast, increases in life expectancy result in a non-monotonic effect on wealth inequality by age and across cohorts.

Central European Journal of Operations Research, 2019

We set up a lifecycle model of a retired scholar who chooses optimally the time devoted to differ... more We set up a lifecycle model of a retired scholar who chooses optimally the time devoted to different activities including physical activity, continued work and social engagement. While time spent in physical activity increases life expectancy, continued scientific publications increases the knowledge stock. We show the optimal trade off between these activities in retirement and its sensitivity with respect to alternative settings of the preference parameters.

SSRN Electronic Journal, 2015

Working Papers in Economic …, 2007

In this paper, we have studied the employment and nonemployment transitions in Spain from 1996 to... more In this paper, we have studied the employment and nonemployment transitions in Spain from 1996 to 2005. To do so, we have used a multi-state multiepisode duration model and a censored continuous-time Markovian matrix. By using the censored Markovian matrix, we ...

Papeles de trabajo, Instituto de …, 2010

Page 1. INTEGRATED RESULTS FOR GA AND NTA FOR SPAIN: SOME IMPLICATIONS FOR THE SUSTAINABILITY OF ... more Page 1. INTEGRATED RESULTS FOR GA AND NTA FOR SPAIN: SOME IMPLICATIONS FOR THE SUSTAINABILITY OF THE WELFARE STATE* Autores: Concepció Patxot(1) Elisenda Rentería(2) Miguel Romero(3) Guadalupe Souto(4) PTNº 7/10 ...

Vienna Yearbook of Population Research, 2019

Progress and Challenges of Nonfinancial Defined Contribution Pension Schemes: Volume 1. Addressing Marginalization, Polarization, and the Labor Market, 2019

We set up a lifecycle model of a retired scholar who chooses opti-mally the time devoted to diffe... more We set up a lifecycle model of a retired scholar who chooses opti-mally the time devoted to different activities including physical activity,continued work and social engagement. While time spent in physicalactivity increases life expectancy, continued scientific publications in-creases the knowledge stock. We show the optimal trade off betweenthese activities in retirement and its sensitivity with respect to alterna-tive settings of the preference parameters.

Encyclopedia of Gerontology and Population Aging, 2021

We use a general equilibrium overlapping generations model implemented with realistic demography ... more We use a general equilibrium overlapping generations model implemented with realistic demography and historical national accounts to backcast national transfer accounts from 1800 to 2009.

$Research paper thumbnail of An indirect method to monitor the fraction of people ever infected with COVID-19: An application to the United States$

PLOS ONE, 2021

The number of COVID-19 infections is key for accurately monitoring the pandemics. However, due to... more The number of COVID-19 infections is key for accurately monitoring the pandemics. However, due to differential testing policies, asymptomatic individuals and limited large-scale testing availability, it is challenging to detect all cases. Seroprevalence studies aim to address this gap by retrospectively assessing the number of infections, but they can be expensive and time-intensive, limiting their use to specific population subgroups. In this paper, we propose a complementary approach that combines estimated (1) infection fatality rates (IFR) using a Bayesian melding SEIR model with (2) reported case-fatality rates (CFR) in order to indirectly estimate the fraction of people ever infected (from the total population) and detected (from the ever infected). We apply the technique to the U.S. due to their remarkable regional diversity and because they count with almost a quarter of all global confirmed cases and deaths. We obtain that the IFR varies from 1.25% (0.39–2.16%, 90% CI) in F...

In this work, we assess the global impact of COVID-19 showing how demographic factors, testing po... more In this work, we assess the global impact of COVID-19 showing how demographic factors, testing policies and herd immunity are key for saving lives. We extend a standard epidemiological SEIR model in order to: (a) identify the role of demographics (population size and population age distribution) on COVID-19 fatality rates; (b) quantify the maximum number of lives that can be saved according to different testing strategies, different levels of herd immunity, and specific population characteristics; and (d) infer from the observed case fatality rates (CFR) what the true fatality rate might be. Different from previous SEIR model extensions, we implement a Bayesian Melding method in our calibration strategy which enables us to account for data limitation on the total number of deaths. We derive a distribution of the set of parameters that best replicate the observed evolution of deaths by using information from both the model and the data.

De Economist, 2020

We investigate the impact of a reduction in the pension replacement rate on the schooling choice ... more We investigate the impact of a reduction in the pension replacement rate on the schooling choice and on inequality in an overlapping generations model in which individuals differ by their life expectancy and in their cost of attending schooling. Within our framework we illustrate that many pension systems are ex ante regressive due to the difference in life expectancy across skill groups. We then derive the level of progressivity that needs to be implemented to restore an equal treatment of the pension system across skill groups.

The Journal of the Economics of Ageing, 2017