Unit-control variable codes

a05 Type of prefectural-level unit to which this county-level unit belongs
   1 Municipal province
   2 Municipal prefecture whose central city is a provincial capital
   3 Municipal prefecture not a provincial capital
   4 Prefectural municipality that is a provincial capital
   5 Municipal prefecture not a provincial capital
   6 District (diqu)
   7 Autonomous department (zizhizhou)
   8 League (meng)   9 Directly administered by the province; no prefectural unit

a06 County-level administrative/analytical status of this unit 
   01 Shixiaqu (SXQ) of a stand-alone (county-like) high-order shi 
   02 SXQ of a high-order shi whose size is intermediate between 
     (01) and (03) [approximate area 460-750 sq km.] 
   03 SXQ of a tightly bounded high-order shi (carved out of a xian) 
   04 SXQ of a high-order shi part of whose territory is detached 
   05 Central-city subset of SXQ 
   06 Periurban subset of SXQ 
   07 Individual qu within SXQ 
   08 Shi that is a municipal county (county-like) 
   09 Shi that is a county municipality (tightly bounded: very small area 
      and/or known to have been carved out of a xian) 
   10 County (xian) 
   11 Autonomous county (zizhixian) 
   12 Banner (qi) 
   13 Autonomous banner (zizhiqi) 
   14 Qu other than urban or periurban 
   15 Feiqu and split mergers 
   16 Municipal-compatible mergers 
   17 Subdivision of county-level unit needed for regional analysis 


a07 Status of this unit's capital 
   1 Cc of provincial-level shi 
   2 Cc of prefectural shi 
   3 Cc of county-level shi 
   4 Zhen 
   5 Xiang seat or other non-zhen 
   6 "Capital" lies outside the unit in a neighboring shi 
   0 Doesn't apply (has no county-level or higher capital)


a21 1990 datafile control scheme
 	FD Fully Differentiated 
 	MQ Merged Qu 
 	MC Municipality-compatible 
 	RS Regional Systems 
	
	FD	MQ	MC	RS 
   0	x	x	x	x 
   1	x	x	x
   2	x	x
   3	x 
   4	x 
   5		x	x 
   6		x	x	x 
   7				x 
   8				x 
   9 SXQ not in any datafile 

Restated: 
   0 FD units unchanged in all datafiles 
   1 FD units unchanged in MQ and MC files but subdivided to form a21=8 units in 
     RS file 
   2 FD units unchanged in MQ file but merged to form a21=7 units in MC and RS files 
   3 FD units merged to form a21=4,5,6 units in MQ file 
   4 MQ units (mergers of a21=3 units) merged to form a21=7 units in MC and RS files 
   5 MQ units (mergers of a21=3 units) unchanged in MC file but subdivided to form 
     a21=8 units in the RS file 
   6 MQ units (mergers of a21=3 units) unchanged in MC and RS files 
   7 MC units (mergers of a21=2,4 units) unchanged in RS file 
   8 RS units formed through subdivision of a21=1,5 units 
   9 Shixiaqu more inclusive than a component MC unit and hence not included in 
     any datafile 


Datafiles: 

a91 FD (Fully Differentiated) File (all urban qu shown separately; no mergers
of guobiao coded units; no analytical subdivisions) a21=0,1,2,3

a92 MQ (Merged Qu) File (selective mergers of urban qu to get mappable units):
a21=0,1,2,4,5,6

a93 MC (Municipality-Compatible) File (extensive mergers of tightly drawn shi
each with its surrounding xian and of units whose territories are
intertwined, yielding a file suitable for regional analysis): a21=0,1,5,6,7

a94 RS (Regional Systems) File (incorporating subdivisions of counties that are
divided between regional systems) a21=0,6,7,8

In due course, we plan to incorporate into ChinaA the entire dataset already
developed for county-level units in 1982-85. This will permit comparisons of
similarly organized findings at two points in time (1982 vs. 1990 or 1985 vs. 1990),
providing an indication of change. ChinaZ, the county-level dataset for 1982-85,
will be incorporated only when ChinaA qua 1990 dataset has been completed. The
following two variables indicate the proposed design of the combined dataset.

a22 1982-90 analytical datafile control scheme 
(1982 file is z96; 1990 file is a92) 
   0 In all three files: Units unchanged in territorial extent from 1982 to 1990 
   1 Only in 1982 File: 1982 units that had been merged by 1990 
   2 In 1982-90 and 1990 Files: 1990 units formed through the merger of 1982 
units 
   3 In 1982 and 1982-90 files: 1982 units that had been subdivided by 1990 
   4 Only in 1990 file: 1990 units formed through subdivision of 1982 units 
   5 Only in 1982 File: 1982 units that were subdivided and regrouped by 1990 
   6 Only in 1990 File: 1990 units formed through regrouping subdivided 1982 
units 
   7 Only in 1982-90 File: Combinations of both 1982 and 1990 units to achieve 
equivalent territories 
Datafiles: 
   a94 1982 File (equivalent to z96): a22=0,1,3,5 
   a95 1990 File (equivalent to a92): a22=0,2,4,6 
   a96 1982-90 File: a22=0,2,3,7 


a23 MC82-85-90 datafile control scheme 
(1982-85 file is z99, 1990 file is a93) 
   0 In all three files; Units of identical territorial extent in 1982-85 and 
1990 
   1 Only in MC82-85 File: 82-85 unit is uncomplicated component of 1990 unit 
   2 In MC82-85-90 and MC90 Files: 1990 unit is a combination of 82-85 units 
   3 In MC82-85 and MC82-85-90 Files: 82-85 unit is a combination of 1990 units 
   4 Only in MC90 File: 1990 unit is uncomplicated component of 82-85 unit 
   5 Only in MC82-85: 82-85 unit in complicated relationship to 1990 units 
   6 Only in MC90 File: 1990 unit in complicated relationship to 82-85 units 
   7 Only in MC82-85-90 File: Combinations of both 82-85 and 1990 units to 
achieve equivalent territories 
Datafiles: 
   a97 MC82-85 File (equivalent to z99): a23=0,1,3,5 
   a98 MC90 File (equivalent to a93): a23=0,2,4,6 
   a99 MC82-85-90 File : a23=0,2,3,7 


PROVISIONAL MACROREGIONAL ASSIGNMENTS

a0900 Inner Asia
a1100 Manchuria Proper
a1200 Manchuria: Tumen Border subsystem
a1300 Manchuria: Northeast Border subsystem
a1400 Manchuria: North Border subsystem
a2100 North China: Northern subsystem
a2200 North China: Southern subsystem
a2300 North China: Eastern subsystem
a3100 Northwest China: Wei-Fen subsystem
a3200 Northwest China: Upper Yellow River subsystem
a4100 Upper Yangzi Proper
a4200 Upper Yangzi: Upper Han Basin subsystem
a5100 Middle Yangzi Proper
a5200 Middle Yangzi: Gan Basin subsystem
a5300 Middle Yangzi: Yuan Basin subsystem
a5400 Middle Yangzi: Guilin subsystem
a6100 Lower Yangzi Proper
a6200 Lower Yangzi: Linhai subsystem
a6300 Lower Yangzi: Wenzhou subsystem
a7100 Southeast Coast: Min Basin subsystem
a7200 Southeast Coast: Zhang-Quan subsystem
a7300 Southeast Coast: Han Basin subsystem
a8000 Lingnan
a9100 Yungui Proper
a9200 Yungui: Guiyang subsystem
a9300 Yungui: South Border subsystem
a9400 Yungui: Southwest Border Subsystem