DHS (Baker 2021)	Pew (Passel and Cohn 2018)	This Article
Foreign-born in ACS or other survey	All foreign born in the 2014 ACS, projected forward to January 2015.	All foreign-born in the ACS each year (or in the CPS for years prior to 2005).	All foreign-born in the ACS, excluding nonimmigrants and those who arrived before 1982
Year of entry	1980-present	1980-present	1982-present
Adjustment for heaping on year of entry	three-year moving average.	Not mentioned.	three-year moving average.
Nonimmigrants	Administrative data on the average number of nonimmigrants present per day between July 1, 2014, and June 30, 2015. Counts only nonimmigrants in those in categories for which the length of stay typically exceeds two months, such as students, temporary workers, and exchange visitors.	Logically imputed in ACS, and then dropped from sample of foreign-born in the ACS.	Logically imputed in ACS, and then dropped from sample of foreign-born in the ACS.
LPR Admissions	USCIS records. For people who adjusted to a green card within the U.S., year of entry is assumed to be their last year of entry after 1980 and before obtaining a green card.	DHS records.	DHS records. Projected LPR population starts at year of admission (not year of entry) since that is the year the LPRs attained that status. However, year of entry is used in breakdowns of population by duration of residence. Each estimate year includes just half of admissions in that year because it represents a mid-year estimate.
Recent refugees, asylees and other humanitarian entrants not yet adjusted to LPR status	Administrative data on dates of entry and dates of adjustment to LPR status show that refugees take on average 2.2 years to adjust and asylees take on average 4.1 years to adjust to a green card. So they counted all refugee entrants for the 2.2 years prior to January 2015 as lawfully present immigrants and people granted asylum for the 4.1 years prior to January 2015 as lawfully present immigrants.	Identifies refugees and asylees in the ACS based on DHS data on country of birth and year of immigration to align with administrative data on these populations.	Counts of refugees, asylees and other humanitarian entrants based on DHS data (found in online tables) by country, year of immigration, and allocated age and sex. Add in up to 4 years’ worth, discounting those who had already been adjusted as LPRs.
Mortality rates for LNH foreign born	Age and sex specific mortality rates for 1999-2001 based on U.S. national vital statistics.	Not stated.	Baseline age- and sex-specific mortality rates for each year obtained from the Human mortality database for the U.S. These rates are adjusted using hazard ratios (from NHIS-linked mortality data) by race/ethnicity and nativity.
Emigration rates for LNH foreign born	Based on Ahmed and Robinson 1994 (average emigration rate of 1.1 percent per year for 1980-2014). Refugees, asylees, and other humanitarian entrants are assumed to have a migration rate of zero	Not stated.	Prediction model based on Social Security earnings data (Schwabish 2009) and adjusted for trends based on residual methodology of Leach (2015). Refugees, asylees and other humanitarian entrants are assumed to have a migration rate of zero
LNH foreign born	2.5%	Not mentioned	1.5%
Nonimmigrants	10%	N/A	N/A
Unauthorized immigrants	10%	10%-20% in the 1995-2000 CPS, with slightly larger (30% or above) adjustment for unauthorized Mexicans; 8%-13% coverage error adjustment in 2000-09 estimates; 5%-7% coverage error adjustment in 2010-16 estimates.	Mexican/LA/Carib: Children 21%, Men steady decline from 20% in 2000 to 8% in 2015, and then rise to 10% in 2018; Women, steady decline from 20% in 2000 to 1% in 2018. Others: 25% lower than Mexican/LA/Carib. All groups: recent arrivals (less than 5 years in the country) have coverage error rates that are three times higher than the rates of longer-term residents (10+ years in the country).
Other populations excluded from potential unauthorized pool	Cubans	Cubans	Cubans