IPUMS-I: descr: GEO2ALT

Select samples

GEO2ALT_US

United State, Consistent PUMA 1980 - 2010 [Level 2; consistent boundaries, GIS]

Codes and Frequencies

Category availability view
Case-count view

An 'X' indicates the category is available for that sample

Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
	Alabama
840001001	1	X	X	X	X	X
840001002	2	X	X	X	X	X
840001003	3	X	X	X	X	X
840001004	4	X	X	X	X	X
840001005	5	X	X	X	X	X
	Alaska
840002540	540	X	X	X	X	X
840002541	541	X	X	X	X	X
	Arizona
840004006	6	X	X	X	X	X
840004007	7	X	X	X	X	X
840004008	8	X	X	X	X	X
840004009	9	X	X	X	X	X
840004010	10	X	X	X	X	X
840004011	11	X	X	X	X	X
840004012	12	X	X	X	X	X
	Arkansas
840005013	13	X	X	X	X	X
840005014	14	X	X	X	X	X
840005015	15	X	X	X	X	X
840005016	16	X	X	X	X	X
840005017	17	X	X	X	X	X
840005018	18	X	X	X	X	X
840005019	19	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840005020	20	X	X	X	X	X
840005021	21	X	X	X	X	X
	California
840006022	22	X	X	X	X	X
840006023	23	X	X	X	X	X
840006024	24	X	X	X	X	X
840006025	25	X	X	X	X	X
840006026	26	X	X	X	X	X
840006027	27	X	X	X	X	X
840006028	28	X	X	X	X	X
840006029	29	X	X	X	X	X
840006030	30	X	X	X	X	X
840006031	31	X	X	X	X	X
840006032	32	X	X	X	X	X
840006033	33	X	X	X	X	X
840006034	34	X	X	X	X	X
840006035	35	X	X	X	X	X
840006036	36	X	X	X	X	X
840006037	37	X	X	X	X	X
840006038	38	X	X	X	X	X
840006039	39	X	X	X	X	X
840006040	40	X	X	X	X	X
840006041	41	X	X	X	X	X
840006042	42	X	X	X	X	X
840006043	43	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840006044	44	X	X	X	X	X
840006045	45	X	X	X	X	X
840006046	46	X	X	X	X	X
840006047	47	X	X	X	X	X
840006048	48	X	X	X	X	X
840006049	49	X	X	X	X	X
840006050	50	X	X	X	X	X
840006051	51	X	X	X	X	X
840006052	52	X	X	X	X	X
840006053	53	X	X	X	X	X
840006543	543	X	X	X	X	X
	Colorado
840008054	54	X	X	X	X	X
840008055	55	X	X	X	X	X
840008056	56	X	X	X	X	X
	Connecticut
840009057	57	X	X	X	X	X
840009058	58	X	X	X	X	X
840009059	59	X	X	X	X	X
840009060	60	X	X	X	X	X
840009061	61	X	X	X	X	X
840009062	62	X	X	X	X	X
840009063	63	X	X	X	X	X
	Delaware
840010064	64	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840010065	65	X	X	X	X	X
	District of Columbia
840011066	66	X	X	X	X	X
	Florida
840012067	67	X	X	X	X	X
840012068	68	X	X	X	X	X
840012069	69	X	X	X	X	X
840012070	70	X	X	X	X	X
840012071	71	X	X	X	X	X
840012072	72	X	X	X	X	X
840012073	73	X	X	X	X	X
840012074	74	X	X	X	X	X
840012075	75	X	X	X	X	X
840012076	76	X	X	X	X	X
840012077	77	X	X	X	X	X
840012078	78	X	X	X	X	X
840012079	79	X	X	X	X	X
840012080	80	X	X	X	X	X
840012081	81	X	X	X	X	X
840012082	82	X	X	X	X	X
840012083	83	X	X	X	X	X
840012084	84	X	X	X	X	X
840012085	85	X	X	X	X	X
840012086	86	X	X	X	X	X
	Georgia
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840013087	87	X	X	X	X	X
840013088	88	X	X	X	X	X
840013089	89	X	X	X	X	X
840013090	90	X	X	X	X	X
840013091	91	X	X	X	X	X
840013092	92	X	X	X	X	X
840013093	93	X	X	X	X	X
840013094	94	X	X	X	X	X
840013095	95	X	X	X	X	X
840013096	96	X	X	X	X	X
	Hawaii
840015542	542	X	X	X	X	X
	Idaho
840016097	97	X	X	X	X	X
840016098	98	X	X	X	X	X
840016099	99	X	X	X	X	X
840016100	100	X	X	X	X	X
840016101	101	X	X	X	X	X
840016102	102	X	X	X	X	X
	Illinois
840017103	103	X	X	X	X	X
840017104	104	X	X	X	X	X
840017105	105	X	X	X	X	X
840017106	106	X	X	X	X	X
840017107	107	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840017108	108	X	X	X	X	X
840017109	109	X	X	X	X	X
840017110	110	X	X	X	X	X
840017111	111	X	X	X	X	X
	Indiana
840018112	112	X	X	X	X	X
840018113	113	X	X	X	X	X
840018114	114	X	X	X	X	X
840018115	115	X	X	X	X	X
840018116	116	X	X	X	X	X
840018117	117	X	X	X	X	X
840018118	118	X	X	X	X	X
840018119	119	X	X	X	X	X
840018120	120	X	X	X	X	X
840018121	121	X	X	X	X	X
840018122	122	X	X	X	X	X
840018123	123	X	X	X	X	X
840018124	124	X	X	X	X	X
840018125	125	X	X	X	X	X
840018126	126	X	X	X	X	X
840018127	127	X	X	X	X	X
	Iowa
840019128	128	X	X	X	X	X
840019129	129	X	X	X	X	X
840019130	130	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840019131	131	X	X	X	X	X
840019132	132	X	X	X	X	X
840019133	133	X	X	X	X	X
840019134	134	X	X	X	X	X
840019135	135	X	X	X	X	X
840019136	136	X	X	X	X	X
840019137	137	X	X	X	X	X
840019138	138	X	X	X	X	X
840019139	139	X	X	X	X	X
840019140	140	X	X	X	X	X
840019141	141	X	X	X	X	X
840019142	142	X	X	X	X	X
840019143	143	X	X	X	X	X
	Kansas
840020144	144	X	X	X	X	X
840020145	145	X	X	X	X	X
840020146	146	X	X	X	X	X
840020147	147	X	X	X	X	X
840020148	148	X	X	X	X	X
840020149	149	X	X	X	X	X
840020150	150	X	X	X	X	X
840020151	151	X	X	X	X	X
840020152	152	X	X	X	X	X
	Kentucky
840021153	153	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840021154	154	X	X	X	X	X
840021155	155	X	X	X	X	X
840021156	156	X	X	X	X	X
840021157	157	X	X	X	X	X
840021158	158	X	X	X	X	X
840021159	159	X	X	X	X	X
840021160	160	X	X	X	X	X
840021161	161	X	X	X	X	X
840021162	162	X	X	X	X	X
840021163	163	X	X	X	X	X
840021164	164	X	X	X	X	X
840021165	165	X	X	X	X	X
840021166	166	X	X	X	X	X
840021167	167	X	X	X	X	X
840021168	168	X	X	X	X	X
840021169	169	X	X	X	X	X
840021170	170	X	X	X	X	X
	Louisiana
840022171	171	X	X	X	X	X
840022172	172	X	X	X	X	X
840022173	173	X	X	X	X	X
840022174	174	X	X	X	X	X
840022175	175	X	X	X	X	X
840022176	176	X	X	X	X	X
840022177	177	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840022178	178	X	X	X	X	X
840022179	179	X	X	X	X	X
840022180	180	X	X	X	X	X
840022181	181	X	X	X	X	X
840022182	182	X	X	X	X	X
	Maine
840023183	183	X	X	X	X	X
	Maryland
840024184	184	X	X	X	X	X
840024185	185	X	X	X	X	X
840024186	186	X	X	X	X	X
840024187	187	X	X	X	X	X
840024188	188	X	X	X	X	X
840024189	189	X	X	X	X	X
840024190	190	X	X	X	X	X
840024191	191	X	X	X	X	X
840024192	192	X	X	X	X	X
840024193	193	X	X	X	X	X
840024194	194	X	X	X	X	X
840024195	195	X	X	X	X	X
	Massachusetts
840025196	196	X	X	X	X	X
840025197	197	X	X	X	X	X
840025198	198	X	X	X	X	X
840025199	199	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840025200	200	X	X	X	X	X
840025201	201	X	X	X	X	X
840025202	202	X	X	X	X	X
	Michigan
840026203	203	X	X	X	X	X
840026204	204	X	X	X	X	X
840026205	205	X	X	X	X	X
840026206	206	X	X	X	X	X
840026207	207	X	X	X	X	X
840026208	208	X	X	X	X	X
840026209	209	X	X	X	X	X
840026210	210	X	X	X	X	X
840026211	211	X	X	X	X	X
840026212	212	X	X	X	X	X
840026213	213	X	X	X	X	X
840026214	214	X	X	X	X	X
840026215	215	X	X	X	X	X
840026216	216	X	X	X	X	X
840026217	217	X	X	X	X	X
840026218	218	X	X	X	X	X
840026219	219	X	X	X	X	X
840026220	220	X	X	X	X	X
840026221	221	X	X	X	X	X
840026222	222	X	X	X	X	X
840026223	223	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840026224	224	X	X	X	X	X
840026225	225	X	X	X	X	X
840026226	226	X	X	X	X	X
840026227	227	X	X	X	X	X
840026228	228	X	X	X	X	X
840026229	229	X	X	X	X	X
840026230	230	X	X	X	X	X
840026231	231	X	X	X	X	X
840026232	232	X	X	X	X	X
840026233	233	X	X	X	X	X
840026234	234	X	X	X	X	X
840026235	235	X	X	X	X	X
840026236	236	X	X	X	X	X
840026237	237	X	X	X	X	X
840026238	238	X	X	X	X	X
840026239	239	X	X	X	X	X
840026240	240	X	X	X	X	X
840026241	241	X	X	X	X	X
840026242	242	X	X	X	X	X
840026243	243	X	X	X	X	X
840026244	244	X	X	X	X	X
	Minnesota
840027245	245	X	X	X	X	X
840027246	246	X	X	X	X	X
840027247	247	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840027248	248	X	X	X	X	X
840027249	249	X	X	X	X	X
840027250	250	X	X	X	X	X
840027251	251	X	X	X	X	X
840027252	252	X	X	X	X	X
840027253	253	X	X	X	X	X
840027254	254	X	X	X	X	X
	Mississippi
840028255	255	X	X	X	X	X
840028256	256	X	X	X	X	X
840028257	257	X	X	X	X	X
840028258	258	X	X	X	X	X
	Missouri
840029259	259	X	X	X	X	X
840029260	260	X	X	X	X	X
840029261	261	X	X	X	X	X
840029262	262	X	X	X	X	X
840029263	263	X	X	X	X	X
840029264	264	X	X	X	X	X
840029265	265	X	X	X	X	X
840029266	266	X	X	X	X	X
840029267	267	X	X	X	X	X
840029268	268	X	X	X	X	X
840029269	269	X	X	X	X	X
840029270	270	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
	Montana
840030271	271	X	X	X	X	X
840030272	272	X	X	X	X	X
840030273	273	X	X	X	X	X
840030274	274	X	X	X	X	X
	Nebraska
840031275	275	X	X	X	X	X
840031276	276	X	X	X	X	X
840031277	277	X	X	X	X	X
840031278	278	X	X	X	X	X
840031279	279	X	X	X	X	X
	Nevada
840032280	280	X	X	X	X	X
840032281	281	X	X	X	X	X
	New Hampshire
840033282	282	X	X	X	X	X
	New Jersey
840034283	283	X	X	X	X	X
840034284	284	X	X	X	X	X
840034285	285	X	X	X	X	X
840034286	286	X	X	X	X	X
840034287	287	X	X	X	X	X
840034288	288	X	X	X	X	X
840034289	289	X	X	X	X	X
840034290	290	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840034291	291	X	X	X	X	X
840034292	292	X	X	X	X	X
840034293	293	X	X	X	X	X
840034294	294	X	X	X	X	X
840034295	295	X	X	X	X	X
840034296	296	X	X	X	X	X
840034297	297	X	X	X	X	X
840034298	298	X	X	X	X	X
840034299	299	X	X	X	X	X
840034300	300	X	X	X	X	X
840034301	301	X	X	X	X	X
840034302	302	X	X	X	X	X
840034303	303	X	X	X	X	X
840034304	304	X	X	X	X	X
840034305	305	X	X	X	X	X
840034306	306	X	X	X	X	X
840034307	307	X	X	X	X	X
840034308	308	X	X	X	X	X
840034309	309	X	X	X	X	X
840034310	310	X	X	X	X	X
840034311	311	X	X	X	X	X
	New Mexico
840035312	312	X	X	X	X	X
	New York
840036313	313	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840036314	314	X	X	X	X	X
840036315	315	X	X	X	X	X
840036316	316	X	X	X	X	X
840036317	317	X	X	X	X	X
840036318	318	X	X	X	X	X
840036319	319	X	X	X	X	X
840036320	320	X	X	X	X	X
840036321	321	X	X	X	X	X
840036322	322	X	X	X	X	X
840036323	323	X	X	X	X	X
840036324	324	X	X	X	X	X
840036325	325	X	X	X	X	X
840036326	326	X	X	X	X	X
840036327	327	X	X	X	X	X
840036328	328	X	X	X	X	X
840036329	329	X	X	X	X	X
840036330	330	X	X	X	X	X
840036331	331	X	X	X	X	X
840036332	332	X	X	X	X	X
840036333	333	X	X	X	X	X
840036334	334	X	X	X	X	X
840036335	335	X	X	X	X	X
840036336	336	X	X	X	X	X
840036337	337	X	X	X	X	X
840036338	338	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840036339	339	X	X	X	X	X
840036340	340	X	X	X	X	X
	North Carolina
840037341	341	X	X	X	X	X
840037342	342	X	X	X	X	X
840037343	343	X	X	X	X	X
840037344	344	X	X	X	X	X
840037345	345	X	X	X	X	X
840037346	346	X	X	X	X	X
840037347	347	X	X	X	X	X
840037348	348	X	X	X	X	X
840037349	349	X	X	X	X	X
840037350	350	X	X	X	X	X
840037351	351	X	X	X	X	X
840037352	352	X	X	X	X	X
840037353	353	X	X	X	X	X
840037354	354	X	X	X	X	X
840037355	355	X	X	X	X	X
840037356	356	X	X	X	X	X
840037357	357	X	X	X	X	X
840037358	358	X	X	X	X	X
840037359	359	X	X	X	X	X
	North Dakota
840038360	360	X	X	X	X	X
840039361	361	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840039362	362	X	X	X	X	X
840039363	363	X	X	X	X	X
840039364	364	X	X	X	X	X
840039365	365	X	X	X	X	X
840039366	366	X	X	X	X	X
840039367	367	X	X	X	X	X
840039368	368	X	X	X	X	X
840039369	369	X	X	X	X	X
840039370	370	X	X	X	X	X
840039371	371	X	X	X	X	X
840039372	372	X	X	X	X	X
840039373	373	X	X	X	X	X
840039374	374	X	X	X	X	X
840039375	375	X	X	X	X	X
840039376	376	X	X	X	X	X
840039377	377	X	X	X	X	X
840039378	378	X	X	X	X	X
840039379	379	X	X	X	X	X
	Oklahoma
840040380	380	X	X	X	X	X
840040381	381	X	X	X	X	X
	Oregon
840041382	382	X	X	X	X	X
840041383	383	X	X	X	X	X
840041384	384	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840041385	385	X	X	X	X	X
840041386	386	X	X	X	X	X
840041387	387	X	X	X	X	X
840041388	388	X	X	X	X	X
840041389	389	X	X	X	X	X
840041390	390	X	X	X	X	X
	Pennsylvania
840042391	391	X	X	X	X	X
840042392	392	X	X	X	X	X
840042393	393	X	X	X	X	X
840042394	394	X	X	X	X	X
840042395	395	X	X	X	X	X
840042396	396	X	X	X	X	X
840042397	397	X	X	X	X	X
840042398	398	X	X	X	X	X
840042399	399	X	X	X	X	X
840042400	400	X	X	X	X	X
840042401	401	X	X	X	X	X
840042402	402	X	X	X	X	X
840042403	403	X	X	X	X	X
840042404	404	X	X	X	X	X
840042405	405	X	X	X	X	X
840042406	406	X	X	X	X	X
840042407	407	X	X	X	X	X
840042408	408	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840042409	409	X	X	X	X	X
840042410	410	X	X	X	X	X
840042411	411	X	X	X	X	X
840042412	412	X	X	X	X	X
840042413	413	X	X	X	X	X
840042414	414	X	X	X	X	X
840042415	415	X	X	X	X	X
840042416	416	X	X	X	X	X
840042417	417	X	X	X	X	X
840042418	418	X	X	X	X	X
840042419	419	X	X	X	X	X
840042420	420	X	X	X	X	X
840042421	421	X	X	X	X	X
840042422	422	X	X	X	X	X
	Rhode Island
840044423	423	X	X	X	X	X
840044424	424	X	X	X	X	X
	South Carolina
840045425	425	X	X	X	X	X
840045426	426	X	X	X	X	X
840045427	427	X	X	X	X	X
840045428	428	X	X	X	X	X
840045429	429	X	X	X	X	X
840045430	430	X	X	X	X	X
840045431	431	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840045432	432	X	X	X	X	X
840045433	433	X	X	X	X	X
840045434	434	X	X	X	X	X
840045435	435	X	X	X	X	X
840045436	436	X	X	X	X	X
	South Dakota
840046437	437	X	X	X	X	X
840046438	438	X	X	X	X	X
	Tennessee
840047439	439	X	X	X	X	X
840047440	440	X	X	X	X	X
840047441	441	X	X	X	X	X
840047442	442	X	X	X	X	X
840047443	443	X	X	X	X	X
840047444	444	X	X	X	X	X
840047445	445	X	X	X	X	X
	Texas
840048446	446	X	X	X	X	X
840048447	447	X	X	X	X	X
840048448	448	X	X	X	X	X
840048449	449	X	X	X	X	X
840048450	450	X	X	X	X	X
840048451	451	X	X	X	X	X
840048452	452	X	X	X	X	X
840048453	453	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840048454	454	X	X	X	X	X
840048455	455	X	X	X	X	X
840048456	456	X	X	X	X	X
840048457	457	X	X	X	X	X
840048458	458	X	X	X	X	X
840048459	459	X	X	X	X	X
840048460	460	X	X	X	X	X
840048461	461	X	X	X	X	X
840048462	462	X	X	X	X	X
840048463	463	X	X	X	X	X
840048464	464	X	X	X	X	X
840048465	465	X	X	X	X	X
840048466	466	X	X	X	X	X
840048467	467	X	X	X	X	X
840048468	468	X	X	X	X	X
840048469	469	X	X	X	X	X
840048470	470	X	X	X	X	X
840048471	471	X	X	X	X	X
840048472	472	X	X	X	X	X
840048473	473	X	X	X	X	X
840048474	474	X	X	X	X	X
840048475	475	X	X	X	X	X
	Utah
840049476	476	X	X	X	X	X
840049477	477	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840049478	478	X	X	X	X	X
840049479	479	X	X	X	X	X
840049480	480	X	X	X	X	X
	Vermont
840050481	481	X	X	X	X	X
	Virginia
840051482	482	X	X	X	X	X
840051483	483	X	X	X	X	X
840051484	484	X	X	X	X	X
840051485	485	X	X	X	X	X
840051486	486	X	X	X	X	X
840051487	487	X	X	X	X	X
840051488	488	X	X	X	X	X
840051489	489	X	X	X	X	X
840051490	490	X	X	X	X	X
840051491	491	X	X	X	X	X
840051492	492	X	X	X	X	X
840051493	493	X	X	X	X	X
840051494	494	X	X	X	X	X
	Washington
840053495	495	X	X	X	X	X
840053496	496	X	X	X	X	X
840053497	497	X	X	X	X	X
840053498	498	X	X	X	X	X
840053499	499	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840053500	500	X	X	X	X	X
840053501	501	X	X	X	X	X
840053502	502	X	X	X	X	X
840053503	503	X	X	X	X	X
840053504	504	X	X	X	X	X
840053505	505	X	X	X	X	X
840053506	506	X	X	X	X	X
840053507	507	X	X	X	X	X
840053508	508	X	X	X	X	X
840053509	509	X	X	X	X	X
	West Virginia
840054510	510	X	X	X	X	X
840054511	511	X	X	X	X	X
840054512	512	X	X	X	X	X
840054513	513	X	X	X	X	X
840054514	514	X	X	X	X	X
840054515	515	X	X	X	X	X
840054516	516	X	X	X	X	X
840054517	517	X	X	X	X	X
840054518	518	X	X	X	X	X
	Wisconsin
840055519	519	X	X	X	X	X
840055520	520	X	X	X	X	X
840055521	521	X	X	X	X	X
840055522	522	X	X	X	X	X
Code	Label	usa 1980	usa 1990	usa 2000	usa 2005	usa 2010
840055523	523	X	X	X	X	X
840055524	524	X	X	X	X	X
840055525	525	X	X	X	X	X
840055526	526	X	X	X	X	X
840055527	527	X	X	X	X	X
840055528	528	X	X	X	X	X
840055529	529	X	X	X	X	X
840055530	530	X	X	X	X	X
840055531	531	X	X	X	X	X
840055532	532	X	X	X	X	X
840055533	533	X	X	X	X	X
840055534	534	X	X	X	X	X
840055535	535	X	X	X	X	X
840055536	536	X	X	X	X	X
840055537	537	X	X	X	X	X
840055538	538	X	X	X	X	X
	Wyoming
840056539	539	X	X	X	X	X
	Other

Explore how IPUMS created this variable

Description

GEO2ALT_US identifies the most detailed areas that can be consistently delineated from the geographic codes available in United States PUMS (Public Use Microdata Series) files from 1980 to 2010. In 1980 PUMS files, the smallest identified units are âcounty groups,â and in later PUMS files, the smallest identified units are Public Use Microdata Areas (PUMAs). All of these units nest within states, but the definitions of PUMAs differ from county groups, and the 1990 PUMAs differ from the 2000 PUMAs (which are used for 2000, 2005 and 2010 samples). GEO2ALT_US is spatially harmonized to account for these boundary changes. Each GEO2ALT_US code corresponds to a distinct set of 1980 county groups and 1990 and 2000 PUMAs that collectively cover a consistent geographic area across time. More details on construction of PUMAs can be found in IPUMS USA website. The following excel file lists GEO2ALT_US and their relationship to CONSPUMA.

A separate variable,Â GEO2_US, identifies sets of 2000 and 2010 PUMAs that comprise comparable populations for samples from 2000 forward. GEO2_US corresponds with CPUMA0010 variable in IPUMS USA .

Some detail is lost in harmonization; see the comparability discussion. A GIS map (in shapefile format), corresponding to GEO2ALT_US can be downloaded from the GIS Boundary files page in the IPUMS International web site. The GIS boundary files for GEO2ALT_US are based on the U.S. Census Bureauâs 2000 TIGER/Line files.

The full set of geography variables for the United States can be found in the IPUMS International Geography variables list. For cross-national geographic analysis on the first and second major administrative level refer to GEOLEV1, and GEOLEV2. More information on IPUMS-International geography can be found here.

Comparability — General

PUMA and county group boundaries were visually inspected within a geographic information system; where boundaries were coincident, or nearly coincident, across time, they were aggregated to the smallest possible number of units to retain the highest possible level of geographic detail. The nation was split into 543 areas that can be consistently identified across samples. A small degree of mismatch was allowed along some boundaries in order to avoid over-aggregation and thereby maintain a high level of geographic detail. Although these boundary mismatches all appeared to be insignificant in size, it is possible that some mismatches involved a substantial population and some portion of the change in population characteristics across samples may be due to changes in the boundaries of the associated county groups and PUMAs. More information on consistent PUMA boundary construction can be found in CONSPUMA. Labels in GEO2ALT_US match CONSPUMA.

Due to significant population losses in the New Orleans area following Hurricane Katrina, the Census merged 3 PUMAs in Louisiana (2201801 and 2201802 merged into PUMA 840022172; and PUMA 2201905 merged into PUMA 840022173). For the 2000 and 2005 samples, PUMAs 2201801 and 2201802 are allocated to GEO2ALT_US unit 172 and PUMA 2201905 is allocated to GEO2ALT_US unit 173. In the 2010 sample, the combined PUMA 2277777 is allocated wholly to GEO2_US unit 172. In effect, the entire area of PUMA 2201905 switches from one GEO2_US unit to another between 2005 and 2010.

Any analysis that uses GEO2ALT_US for both 2010 and earlier samples should recode GEO2ALT_US codes 172 and 173 to a single code in order to achieve comparability.

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Codes and Frequencies

Description

Comparability — General

Universe

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