Pew Research Center designed this study to assess the current state of online survey sampling methods – both probability-based and opt-in – and determine their accuracy on general population estimates ...

This article is published through collaboration between PUSKAPA and The Conversation Indonesia, and is the second in a series of two articles on ethics, opportunities and challenges in involving ...

This book shows researchers in education, psychology, health, and other social sciences how to mix qualitative and quantitative research methods together with confidence. How can researchers sequence ...

Empirical research requires good data to complement statistical rigor in providing answers to global poverty questions. Poor data quality can lead to biases in causal inference, lower the probability ...