I am proposing to research female infanticide because I want to find out what explains the prevalence of son preference during fertility declines, in order to help my reader, understand how women’s decisions to commit infanticide can be reinforced.
Q: What explains variations in son preference across certain family structures during declining fertility rates?
India’s 2011 Census conducted by the Government of India is a survey from both country and regional level featuring demographic stats such as fertility rates, birth rates, income and female and male population but also includes survey statistics on social factors such as religion and households. The key data set I found and that will be relevant to include in my RD was on Household Composition and Size in India. 
Within this data set, family compositions is categorized by family structure such as, “Single person household, Nuclear household, Sub-Nuclear household, Supplemented nuclear household, Broken extended household, Joint household, and Others”.  In evaluating this data set, I would like to use the social dynamics of households, more specifically, family structures to explain variances in son preference as not only explanations to the existence of preference but explanations to its prevalence within certain family structures than others. I also wish to evaluate the relationship between family structure and son preference and possibly look at how family structures are identified and outlined by other scholars and how I would possibly differ in labeling them.
I would operationalize this dataset using nominal measurement of 0 or 1 in meaning these structures demonstrated son preference as either present or absent. Additionally, it may be safe to consider measuring each family structure type from 1-8 based on their category and then significance in degree of preference (stronger or weaker) within each family structures type.
Limitations of this data set may be in its assumptions of certain household types and then in turn maybe more specific to certain regional variations rather than variations in son preference so it will be important to make such a differentiation to avoid confusion and assumption from the data. I think in creating my data set I would need to make such a distinction between expected family structures and how they are organized versus how I intended to label and measure them.
 “Households by composition and size – 2011”. Office of the Registrar General & Census Commissioner (New Delhi, India: Government of India, 2011).
“Households by composition and size – 2011”. Office of the Registrar General & Census Commissioner (New Delhi, India: Government of India, 2011). http://www.censusindia.gov.in/2011census/hh-series/hh04.html (Accessed October 10, 2019).