Estimation of economic benefits of biodegradable fishing net by using contingent valuation method (CVM)

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Estimation of economic benefits of biodegradable fishing net by using contingent valuation method (CVM)

Seong-Wook, P ARK Hyeok-Jun K WON

¹

and Seong-Kwae P ARK *

¹

Fisheries System Engineering Division, National Fisheries Research Development Institute, Busan 619-750, Korea

1

Faculty of Marine Business & Economics, Pukyong National University, Busan 608-737, Korea

The main purpose of this study is to estimate willingness to pay (WTP) by the general publics, assuming that they pay tax or charge for protecting marine living resources and environment through developing and supplying biodegradable fishing nets. This study employed a contingent valuation method (CVM) which is an econometric method. The survey was conducted by using both double-bounded dichotomous choice and open-ended survey. Tobit model was used for the analysis. The variables included concerns about marine environment and fishing net discarded, sex, age profile, number of family members, educational level and personal disposable income. Annual average WTP per family for the biodegradable fishing net development and supply was estimated at 5,294 won and national WTP amounted to some 84.2 billion won. This includes both of use and non-use value of biodegradable fishing nets.

Keywords: Contingent valuation method (CVM), Biodegradable fishing net, Conservation, Ecosystem, Tobit model

* Corresponding author: [email protected], Tel: 82-51-629-5958, Fax: 82-51-629-5953

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1997; Kim and Byun, 2003).

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P x WTP

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(Hanemman, 1984; Cameron and James, 1987;

Hanamman et al., 1991).

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model) . WTP

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β , x i

, u i 0 σ

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y i 0 .

y i 0 x i

. (Tobin, 1958).

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N β σ

²

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y i 0 N 0 , y i 0, N 1

(Maddala, 1983).

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²

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^βx

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ⁱ

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²

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²

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0 ln ( ¹ ^Φ ( ^____ σ )) ES ^Σ

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ES Σ

i

0 ( ¹ ^Φ ( ^____ _σ )) _ES ^Σ

_i

₀ ^__ ₂

(WTP i βx ⁱ )

²

[ ^ln2 ^{π lnσ}

²

___________ _σ ] ⁽¹⁰⁾

(βxi)² _____

2σ² (yi βxi)² ________

2σ²

(βxi)² _____

2σ² (yi βxi)² ________

2σ²

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(marginal effect)

.

(11),

(12) (Kim, 1997).

∂E [ES ⁱ

^*

/ X i ]

___________ β (11)

∂X ⁱ

∂E [ES ⁱ

^*

/ X i ] βX ⁱ

___________ _∂X _i β Φ ( ^____ _σ ) ⁽¹²⁾

WTP

(x 1 ), (x 2 )

( (x 3 ), (x 4 ), (x 5 ),

(x 6 ), (x 7 ), (x 8 ))

.

MWTP

. SPSS

12.0 SAS 9.1 .

Table 1 .

.

1, 0

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. 100

1 100 150

2, 500 10

. 1,

0 .

(8) (10) Table 2

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β (Kim, 1997). 5%

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69.9 . WTP

WTP

Table 1. Characteristic of independent variables

Category Minimum Maximum Mean Std. Note

x

1

1 5 2.443 0.971 reversed-coding

x

2

1 5 2.750 1.005 reversed-coding

x

3

0 1 0.512 0.500

x

4

25 71 38.815 10.584

x

5

0 7 3.696 1.123

x

6

0 20 14.812 2.670

x

7

1 10 3.909 2.632

x

8

0 1 0.026 0.159

Table 2. Result of Tobit model estimation

Category Coefficient Standard error χ

²

t-ratio Const 347.826

x

1

69.878 20.467 11.66 3.41***

x

2

2.992 20.331 0.02 0.15

x

3

63.294 37.326 2.88 1.70*

x

4

6.027 1.865 10.45 3.23***

x

5

32.893 16.817 3.83 1.96**

x

6

21.429 7.088 9.14 3.02**

x

7

24.472 7.182 11.61 3.41***

x

8

153.541 116.162 1.75 1.32

Log likelihood 6316***

* Significant at 99%, Significant at 95%, * Significant

at 90% confidence level

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. , ,

WTP .

WTP Table 3 . WTP

, WTP, WTP

. 750 ,

WTP 527.3 .

WTP 441.2 86.1

. 1 WTP

441.2 . WTP

1 WTP .

.

. ,

.

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.

WTP

WTP .

(1 ) WTP 12

2005

15,903,679

. WTP

. 1 WTP

5,294.4

WTP

842 .

441.2 12 15,903,679 84,200 Sim and Sin (2006)

9,386 9,908 / . WTP

,

WTP .

.

,

. Lee et al. (2004)

Table 3. Result of WTP estimation (Economic benefit of biodegradable fishing net)

Minimum Maximum Midium Arithmetic mean Tobit mean

WTP(won) 0 2500 750 527.3 441.2

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WTP . ,

WTP

(Carson, 1997;

Welsh & Poe, 1998).

CVM .

WTP .

, 1,041 . WTP

.

,

, ,

, .

WTP

. ( )

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( ) .

WTP

WTP 441.2 .

. WTP

5,294.2 . WTP 842

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,

. 2010 40

.

,

. CVM

WTP

MWTP

.

, ,

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, . .

(

, RP 2010-FE 010) .

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