Alex Cohen is the Director of Learning and Evaluation for the Richard M. Fairbanks Foundation. Stanford’s Center for Research on Education Outcomes (CREDO) recently released its latest study on academic performance in Indianapolis schools. The study aims to answer an important question: How do charter schools and Innovation Network Schools (which are part of the […]

减少香烟中的尼古丁含量可能会导致一些目前吸烟者吸烟更多——至少在短期内是这样。但也有证据表明减少香烟中的尼古丁有助于减少吸烟。