Embedded Files
My current research focuses on how biological timing, school schedules, sleep, and educational trajectories and outcomes interact during adolescence. I combine chronobiology, school-based research, and large-scale administrative education data to study how the temporal organization of schooling aligns with adolescents’ biological rhythms and to generate evidence and tools that can inform education policy.
Current projects examine the distribution of school start times across Argentina, their relationship with geography and sunrise time, differences in sleep and chronotype across school schedules and seasons, and the links between school timing, attendance, academic outcomes, and educational trajectories.
First Map of School Start Times in Argentina
First Map of School Start Times in Argentina
What time do secondary schools start across Argentina? In this project, we systematically describe school start times at the national and jurisdictional levels using administrative education data.
We also examine how school start times relate to local sunrise throughout the year. This is particularly relevant in Argentina because the country spans a wide geographical area while using a single official time zone (UTC−3).
The project provides a national diagnosis of the temporal organization of secondary schooling and aims to generate evidence that can inform discussions about school schedules and education policy.
Full results are available in Working Paper DPP No. 38 from CEPE-UTDT, published on November 13, 2025.
School timing, chronotype, and outcomes during adolescence
School timing, chronotype, and outcomes during adolescence
During adolescence, chronotype, or the time indicated by our internal biological clock, shifts later, which can conflict with early school schedules. We study how school start time and chronotype interact to affect sleep, social jetlag, school attendance, academic performance, and educational trajectories during adolescence.
Our work takes advantage of the coexistence of morning, afternoon, and evening school timings in some Argentine schools to study how different forms of temporal school organization interact with age and individual chronotype.
Changes in school start time
In this line of research, we examine, for the first time in Argentina, how changes in school start time affect sleep, academic performance, attendance, and cognitive performance.
School timing, seasonality, and the solar clock
School schedules are defined according to social clock time, but their biological effects also depend on light exposure. We investigate how school schedules interact with season, photoperiod, sunrise time, and geographical location in shaping sleep and chronotype during adolescence.
This line of research aims to understand whether the same clock time can have different biological consequences depending on its relationship with the light–dark cycle.
Other projects (past or current)
My endogenous clock
My endogenous clock
A free app for mobile devices which allows users to obtain a self-diagnosis of the health of their sleep and circadian rhythms and to obtain customized recommendations to improve and/or maintain healthy circadian rhythms. More information: www.mirelojinterno.org
Crono Argentina
Crono Argentina
How people sleep in Argentina? Sleep quality, sleep duration and sleep timing.
(Little) Time drawings
(Little) Time drawings
How people represent time in space? What are the shapes of time? and the sizes? How about the time direction? What are the factors which modulate these time drawings?
How people represent time in space? What are the shapes of time? and the sizes? How about the time direction? What are the factors which modulate these time drawings?
Daily fluctuations in decision-making
Daily fluctuations in decision-making
Two key parameters of decision-making are time and accuracy. Optimally, decisions should be accurate and fast. How time and accuracy fluctuate across the day? Can we evaluate these daily variations?
Page updated
Google Sites
Report abuse