N.C. Aizenman of the Washington Post offers "Study Says Foreigners In U.S. Adapt Quickly", an article about a new Manhattan Institute report called "Measuring Immigrant Assimilation", authored by economist Jacob Vigdor of Duke University. He constructed an "assimilation index" based on economic, cultural, and civic assimilation. One of the issues with the index is that it probably doesn't include a question on whether those immigrants subscribe to our laws or whether they think they don't apply to them, and it probably doesn't cover irredentism-related issues. It's also a mixed bag; while the...