summarize the key points of the paper:Willekens, F., D. Massey, J. Raymer, and C. Beauchemin. 2016. "International Migration under the Microscope." Science 352(6288):897-99.

The paper "International Migration under the Microscope" by Willekens et al. (2016) discusses the importance of detailed microsimulation approaches to understand the complexities of international migration. Here are the key points:

**Need for Granular Data**: The authors emphasize the necessity of moving beyond aggregate migration statistics to more granular data that can capture individual-level migration processes, motivations, and impacts.

**Microsimulation Models**: They highlight the utility of microsimulation models as a method to analyze migration dynamics, which allow researchers to simulate individual behavioral responses to changing socio-economic conditions and policies.

**Interdisciplinary Approach**: The paper advocates for an interdisciplinary approach, combining insights from demography, economics, sociology, and geography to enrich the understanding of migration.

**Policy Implications**: Understanding the micro-level factors influencing migration can inform policies aimed at managing migration flows and addressing challenges such as integration and social cohesion.

**Future Research Directions**: The authors call for further research that utilizes microsimulation and incorporates longitudinal data to analyze migration trends and their broader societal impacts over time.

Overall, the paper argues for a nuanced and detailed examination of international migration, which is essential for effective policy-making and understanding the phenomenon's complexities.