Table 3 Comparing covariates of developed and developing importers

From: The global seafood trade, embodied nutrients, and nutritional affordability

  

Unweighted

Weighted

  

Mean

developing

Mean

developed

Difference

Test

statistic

P

value

Mean

developing

Mean

developed

Difference

Test

statistic

P

value

Preservation

           
 

Live

0.086

0.102

−0.016

−13.53

<0.001

0.026

0.037

−0.011

−14.00

<0.001

 

Fresh

0.253

0.355

−0.102

−54.09

<0.001

0.123

0.473

−0.350

−136.08

<0.001

 

Frozen

0.589

0.473

0.116

56.01

<0.001

0.817

0.594

0.223

116.44

<0.001

 

Other preservation

0.191

0.204

−0.013

−8.14

<0.001

0.065

0.049

0.016

14.34

<0.001

Portion

           
 

Whole

0.750

0.712

0.038

20.68

<0.001

0.866

0.694

0.172

99.48

<0.001

 

Fillet

0.172

0.208

−0.036

−22.20

<0.001

0.076

0.253

−0.177

−119.97

<0.001

 

Meat

0.050

0.052

−0.002

−1.84

0.066

0.048

0.044

0.004

4.62

<0.001

 

Other Portion

0.028

0.0283

−0.0003

−0.49

0.628

0.009

0.0085

0.0005

1.14

0.256

Seafood Type

           
 

Fish

0.706

0.704

0.002

1.21

0.224

0.808

0.761

0.047

25.42

<0.001

 

Mollusk

0.145

0.138

0.007

4.99

<0.001

0.099

0.071

0.028

21.75

<0.001

 

Crustacean

0.128

0.137

−0.009

−6.51

<0.001

0.089

0.166

−0.077

−54.39

<0.001

Number of Obs.

 

135,813

99,927

   

135,246

99,725

   
  1. Reports mean and weighted mean covariates for developed and developing countries using Dev 1, where weighting is by volume of each transaction. Results for Dev2 through Dev 6 are in Supplementary Tables 3–7. For Preservation and Portion, some products can be coded in multiple categories or in none of the categories due to ambiguity in the product descriptions, so mean percentages do not sum to 100. For binary variables (Live, Fresh, Frozen, Other Preservation, Whole, Fillet, Meat, and Other Portion), test statistics are t statistics from linear regressions. Developing country importer shares are higher than developed country importer shares for most of the higher valued characteristics (Live, Fresh, Other Preservation, and Fillet. For the lower valued characteristics, developing country importer shares are higher than developed country importer shares (Frozen and Whole).
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