11. APPENDIXES

APPENDIX 1. CONSUMERS' SURVEY

Survey sites and number of consumers by provinces

	Province	No. of consumers
Northern	Chiang Mai	44
	Phetchabum	44
Northeastern	Khon Kaen	48
	Nakhon Ratchasima	51
Central plain	Pathum Thani	55
Eastern	Chachoensao	47
Western	Suphanburi	55
Urban	Bangkok	120
Total		456

APPENDIX 2. MARKETING SURVEY AND OBSERVATION SITES

Province		No. of respondents
		Fish farmers	Fish collectors	Fish agents	Wholesalers	Retailers	Processors
Bangkok		(3)	-	(3)	1	5	-
Central
	Angthong	-	5+(4)	-	4	5	5
	Singburee	-	-	-	-	-	(2)
	Pathumthanee	-	-	(5)	(2)	(5)	-
West
	Nakhonpathom	2	-	6+(2)	5+(3)	-	(1)
East
	Samutprakarn	(2)	-	-	-	-	(2)
North
	Chiengmai	-	-	-	(4)	-	-
	Petchaboon	(3)	-	-	(1)	-	(1)
South
	Songkhla	(2)	-	-	-	-	-

Total:

formal interviews - 38 (with questionnaire)
informal interviews - 45 ( no. of respondents shown in brackets)

APPENDIX 3. RESULT OF DEMAND REGRESSION AND DATA USED IN DEMAND FUNCTION

Estimating 1979-1996

A. Result

	Constant	Own-price	Chicken-price	Disposable income
Co-efficient	142700	-7.91	2.86	2.75
Standard error	107140	5.35	1.10	2.26
t-ratio	1.33*	-1.49*	2.62**	1.43*
Adj. R2	0.91

** significant level at 0.05 level ( one tailed test)
* significant level at 0.10 level ( one tailed test)

Retail Price

Pork	Beef	Chicken	Striped Snakehead	Walking Catfish	Indo-Pacific Mackerel
37.49	32.89	26.84	28.67	20.08	15.55
42.35	48.49	28.55	64.79	34.40	20.52
48.76	55.67	30.29	36.01	32.60	21.93
47.77	56.72	30.20	41.87	39.13	25.82
52.18	56.44	33.20	45.78	37.05	28.43
51.42	56.70	33.08	44.84	34.48	30.09
42.53	56.70	24.99	46.51	35.69	26.46
43.94	56.30	26.36	42.80	33.78	26.40
48.99	55.96	27.39	46.20	30.38	24.71
53.39	57.47	25.72	47.50	32.14	28.66
58.52	63.57	29.55	54.75	38.68	27.76
59.12	66.15	32.14	58.83	36.41	31.41
64.49	67.92	37.63	59.19	37.98	39.04
70.82	70.12	36.41	69.70	40.79	34.26
63.88	70.98	37.26	67.47	32.81	38.94
59.80	71.35	41.46	70.50	33.07	42.23
72.45	72.07	47.18	71.37	33.58	38.14
77.90	72.42	51.70	68.14	32.70	47.52

C: Quantity and Price

Year	Quantity Demand of Freshwater	Average Price
1980	33 923.98	16.22
1981	47 104.66	18.37
1982	45 226.45	17.93
1983	45 129.72	18.09
1984	46 423.21	17.67
1985	71 090.52	16.97
1986	83 030.90	16.93
1987	76 676.77	17.89
1988	88 686.42	17.39
1989	88 052.51	18.07
1990	95 413.59	19.90
1991	113 406.52	20.16
1992	129 306.37	19.49
1993	148 318.43	21.15
1994	157 691.65	23.32
1995	185 834.58	23.63
1996	220 713.17	27.80

D: Income and index

Year	Disposable Income (Baht/Head)	Wholesale Price Index (WPI)* Based on 1985
1979	9 364	68.5
1980	10 981	75.6
1981	12 164	77.7
1982	13 416	97.4
1983	14 134	101.5
1984	14 678	91.7
1985	15 357	100
1986	15 987	111.5
1987	17 826	109.5
1988	20 422	115.9
1989	23 816	138.1
1990	26 339	142.6
1991	29 414	157.3
1992	32 435	172.3
1993	35 313	179.4
1994	38 794	203.4
1995	43 863	213.2
1996	47 346	242.3

* Index for fish and other freshwater fish only