By John Byrne Western sanctions against Russia for the invasion of Ukraine are doing their job — and decimating the Russian economy, according to a new paper headed up by Jeffrey Sonnenfeld of Yale University. “The paper’s results include sobering facts about the Russian economy,” Axios reports. “‘Russian imports have largely collapsed,’ the paper says — creating massive supply shortages and denying the country crucial parts and technologies.” The exodus of over 1,000 global companies from Russia has severely damaged its economy, the authors argue, and any posturing of strength or resilience b…