Peter Ma

https://www.pewresearch.org/fact-tank/2020/07/23/are-you-in-the-american-middle-class/?amp=1

https://www.pewresearch.org/fact-tank/2021/05/11/10-key-findings-about-jewish-americans/

https://www.pewforum.org/2021/02/16/faith-among-black-americans/

https://www.pewresearch.org/fact-tank/2021/06/01/facts-about-americans-and-facebook/