Causal Inference in Recommendation Systems

We have briefly touched some concepts of causal inference in [1, 2]. This post introduces some more specific works which apply causal inference in recommendation systems. Some works need to know the background of backdoor and frontdoor adjustments. So we will introduce them first. Backdoor and frontdoor adjustment  Suppose we have a causal graph like …

Dollar cost average on TQQQ vs QQQ [Simulation]

This post runs a simple simulation on using the Dollar-Cost-Average strategy to invest in QQQ vs. TQQQ, its 3x-leveraged ETF. In the simulation, QQQ will plunge 34% after 20 rounds. One round is a small up-and-down cycle – the index first moves up 1% then 3% down, until 34% down from the top. After reaching …