Interviews with adolescents and caregivers yielded data on family cohesion, parental monitoring, and school engagement; school records provided data on grade point average. (link.springer.com)
But their review of yield data for the past 30 years on different agricultural methods found that in developed nations, yields were almost equal from organic and conventional farms. (livescience.com)
Online engagement also yields data in the form of responses to messages and fundraising appeals. (epolitics.com)