How can researchers isolate media effects on global public opinion of a treaty?

[RyanT]

I'm conducting a comparative analysis of global public opinion regarding a major international treaty, and I'm finding significant discrepancies between official government positions and the views expressed in cross-national surveys. My research focuses on how media framing in different regions influences these perceptions. For other scholars working in this area, what methodologies have you found most effective for isolating the impact of domestic media ecosystems from other variables like education levels or economic self-interest? I'm also grappling with how to account for non-response bias in countries with lower survey participation rates, and whether digital sentiment analysis from social media can reliably supplement traditional polling data for a more nuanced picture.

[Scott65]

Nice project. A robust way to isolate the impact of domestic media ecosystems is to treat this like a mixed-methods, cross‑national panel study. Build a multi‑level model with individual respondents nested in countries and time, and include country fixed effects to absorb structural differences (education systems, GDP, etc.). Key variables include: self-reported media exposure to domestic outlets, trust in national media, and a quantified framing index derived from content analysis of leading outlets. Use a difference‑in‑differences design around clear exogenous media shocks (regulatory changes, public broadcasting reforms, or major policy debates) to isolate causal effects of the domestic media environment on opinions about the treaty. Be sure to test measurement invariance for survey items across countries so you’re truly comparing like with like.