This thesis consists of three essays in applied microeconomics: First, heat and school absence: evidence from a survey of Indian children. Second, heatwaves and short-term morbidity in India. Third, intra-family marriage and pregnancy outcomes. Chapter 1. India is the second most populous country on earth with young people representing a significant number of the population resulting in data that indicates such figures at 38 per cent. With such high numbers, major consideration must be given into developing informed and targeted policies to ensure positive educational outcomes for young people. This paper contributes to existing literature by investigating the impact of high temperatures on students’ rates of absenteeism, relying on the short-term exogenous variation in daily maximum temperatures. The paper highlights the heterogeneity of the effect of temperature by climate zone. To create data, we link information on children’s school absences from the India Human Development Survey (IHDS-II) in combination with meteorological data from the ERA-Interim archive taken from a thirty day period prior to individual interview dates. Our findings suggest that high temperatures have a substantial negative impact on students’ attendance in rural areas. However, limited evidence of such an effect is found in urban areas. Our results therefore indicate a need to implement future in-depth studies. Chapter 2. Within this chapter, we investigate the impact of prolonged heat exposure on individuals short-term morbidity rates over a thirty day period prior to the interview date. We work with a broad dataset and use an econometric model that utilizes plausibly exogenous variation in high weather temperatures. We implement the percentile-based approach and three different heatwave metrics as a innovative way of defining and capturing the impact of heatwaves on health outcomes. Our results show that heatwave intensity of the eighty-fifth percentile over the duration of three consecutive days of extensive heat has a significant adverse effect on individuals short-term morbidity. More so, our findings indicate a disparity between genders in relation to the impact of heatwaves. Finally, it can be suggested that individuals having to travel an extensive distance in order to access water are most affected by high temperatures. Chapter 3. Millions of people worldwide are married to their blood relatives, yet the resulting impact on offspring health continues to be debated. Within this paper, we provide evidence around this debate by studying the birth outcomes from a large, representative sample of Indian women in varying marital circumstances. We explore the impact of intra-family marriage on negative pregnancy outcomes including stillbirth, miscarriage, and child death after birth. We utilize an ordinary least squares model (OLS), which controls for a wide range of financial and family factors. The results show that being a woman related to her husband by blood increases the probability of experiencing negative pregnancy outcomes by 2.8 percentage points. Our finding is robust using the instrumental variable approach (IV). The instrumental variable represents the ambient level of violence against women, which positively affects the probability of consanguineous marriage. The IV approach leads to a slightly smaller adverse impact of 2.2 percentage points. In addition, the OLS results provide suggestive evidence that intra-family marriage has no heterogeneous impact across religion types.