Table 3. Sample statistics

(a) All wage earning white-collar worker households (Broadly-defined sample)

(b) Male sole white-collar wage earner head households with bonus receipts in the regular bonus months (Narrowly-defined sample)

Public & Private	Public	Private	Public & Private	Public	Private
Full sample: Jul 1997 to Jun 2008	Mean	Std. Dev.	Mean	Std. Dev.	Mean	Std. Dev.	Mean	Std. Dev.	Mean	Std. Dev.	Mean	Std. Dev.
Monthly disposable income	556	518	608	594	524	462	530	470	545	479	521	464
Household head regular monthly income	445	184	455	162	438	196	466	171	474	154	461	180
Household head bonus income	123	358	143	357	111	357	156	403	164	375	151	419
Monthly consumption expenditure	314	253	323	261	307	247	307	236	310	237	306	235
Monthly services expenditure	140	153	141	158	139	150	138	135	136	141	139	132
Monthly non-durables expenditure	115	46	119	47	112	45	112	43	115	44	110	42
Monthly semi-durables expenditure	35	49	37	52	34	47	34	43	35	43	34	44
Monthly durables expenditure	24	150	26	154	22	147	23	149	24	147	23	150
Annual income in the previous year (before tax)	8,634	3,518	9,180	3,514	8,291	3,476	7,743	2,786	7,804	2,481	7,706	2,958
Age of the household head	45.0	9.7	45.5	9.4	44.7	9.8	42.4	9.2	43.1	9.0	42.0	9.3
Number of family members	3.5	1.1	3.6	1.1	3.5	1.1	3.5	1.1	3.6	1.1	3.5	1.0
Number of workers in the household	1.6	0.7	1.6	0.7	1.5	0.7	1.0	0.0	1.0	0.0	1.0	0.0
Number of observations (Number of households)	258,328	(48,308)	99,651	(18,597)	158,677	(29,770)	97,131	(19,248)	37,040	(7,315)	60,091	(11,947)
Pre-reform: Jul 1997 to Jun 2002	Mean	Std. Dev.	Mean	Std. Dev.	Mean	Std. Dev.	Mean	Std. Dev.	Mean	Std. Dev.	Mean	Std. Dev.
Monthly disposable income	573	549	629	620	539	497	545	504	572	528	531	490
Household head regular monthly income	450	182	462	162	443	192	469	171	484	152	461	181
Household head bonus income	131	369	152	367	118	369	162	413	178	386	154	427
of which in March	61	115	136	124	14	79	69	110	216	78	0	0
of which in June	472	580	646	496	367	601	604	603	760	441	515	662
of which in July	213	439	140	357	258	477	285	503	159	381	362	551
of which in December	800	601	909	484	734	653	1,036	516	1,046	322	1,030	598
Monthly consumption expenditure	317	258	328	270	310	251	310	237	316	239	306	236
Monthly services expenditure	137	157	139	162	136	154	134	137	134	138	135	137
Monthly non-durables expenditure	117	47	121	47	115	46	114	44	119	44	112	44
Monthly semi-durables expenditure	37	50	40	54	36	48	36	43	38	43	35	43
Monthly durables expenditure	25	154	28	164	23	148	24	150	26	152	23	148
Annual income in the previous year (before tax)	8,866	3,599	9,403	3,591	8,538	3,565	7,879	2,819	7,991	2,464	7,816	2,996
Age of the household head	44.6	9.8	45.0	9.5	44.4	9.9	41.9	9.2	42.4	8.8	41.7	9.4
Number of family members	3.6	1.1	3.6	1.2	3.5	1.1	3.6	1.1	3.6	1.1	3.5	1.0
Number of workers in the household	1.6	0.7	1.6	0.7	1.5	0.7	1.0	0.0	1.0	0.0	1.0	0.0
Number of observations (Number of households)	123,685	(23,982)	46,895	(9,108)	76,790	(14,892)	46,198	(9,429)	16,496	(3,386)	29,702	(6,044)
Post-Reform: from Jul 2003 to Jun 2008	Mean	Std. Dev.	Mean	Std. Dev.	Mean	Std. Dev.	Mean	Std. Dev.	Mean	Std. Dev.	Mean	Std. Dev.
Monthly disposable income	533	481	577	555	504	423	508	426	514	412	504	436
Household head regular monthly income	438	185	446	161	433	199	463	169	464	154	462	179
Household head bonus income	110	337	127	339	99	336	142	384	145	358	140	402
of which in March	7	82	3	23	9	103	0	0	0	0	0	0
of which in June	416	565	558	490	324	590	538	610	608	466	491	684
of which in July	190	420	135	341	225	461	272	493	190	399	329	542
of which in December	674	559	805	465	588	597	938	455	955	322	925	532
Monthly consumption expenditure	311	249	319	253	306	246	305	234	304	233	306	235
Monthly services expenditure	143	150	144	154	143	148	142	134	138	140	144	128
Monthly non-durables expenditure	113	45	117	46	110	43	109	42	112	44	107	40
Monthly semi-durables expenditure	33	48	34	49	32	47	32	42	31	42	33	44
Monthly durables expenditure	22	147	24	145	22	148	22	143	22	140	22	153
Annual income in the previous year (before tax)	8,390	3,417	8,926	3,422	8,043	3,369	7,588	2,667	7,594	2,479	7,585	2,883
Age of the household head	45.5	9.6	46.1	9.4	45.1	9.7	43.0	9.0	43.7	9.2	42.6	9.2
Number of family members	3.5	1.1	3.5	1.1	3.5	1.1	3.5	1.0	3.5	1.1	3.5	1.0
Number of workers in the household	1.6	0.7	1.6	0.7	1.5	0.7	1.0	0.0	1.0	0.0	1.0	0.0
Number of observations (Number of households)	109,426	(21,290)	43,038	(8,349)	66,388	(12,975)	41,172	(8,375)	16,656	(3,344)	24,516	(5,042)