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Table 1.

Variable definitions with coding used for regression modeling. DOI: https://doi.org/10.1525/elementa.003.t1

Dam decision alternative question 1 (rotated question and response order; n = 1,582)

Damhydro: In your opinion, is it more important to use dams on New Hampshire rivers and streams to generate electricity, or is it more important to remove dams and allow free-flowing rivers that benefit fish and wildlife? (rotated response order)

  • Use dams to generate electricity (coded 1; 46%)

  • Remove the dams and allow free-flowing rivers (coded 2; 33%)

  • Don’t know/no answer (DK/NA) (coded 3; 21%)

 

Dam decision alternative question 2 (rotated question and response order; n = 1,016)

Damhis: In your opinion, is it more important to keep dams in place on New Hampshire rivers and streams in order to preserve New Hampshire’s industrial history, or is it more important to remove the dams and allow free-flowing rivers that benefit fish and wildlife?

  • Keep dams to preserve New Hampshire’s industrial history (coded 1; 29%)

  • Remove the dams and allow free-flowing rivers (coded 2; 52%)

  • Don’t know/no answer (DK/NA) (coded 3; 19%)

 

Dam decision alternative question 3 (rotated question and response order; n = 1,016)

Damrec: In your opinion, is it more important to keep dams in place on New Hampshire rivers and streams in order to preserve recreational opportunities in lakes and ponds, or is it more important to remove the dams and allow free-flowing rivers that benefit fish and wildlife?

  • Keep dams to preserve recreational opportunities (coded 1; 37%)

  • Remove the dams and allow free-flowing rivers (coded 2; 43%)

  • Don’t know/no answer (DK/NA) (coded 3; 20%)

 

Dam decision alternative question 4 (rotated question and response order; n = 1,016)

Damprop: In your opinion, is it more important to keep dams in place on New Hampshire rivers and streams in order to preserve waterfront property values, or is it more important to remove the dams and allow free-flowing rivers that benefit fish and wildlife?

  • Keep dams to preserve waterfront property values (coded 1; 27%)

  • Remove the dams and allow free-flowing rivers (coded 2; 54%)

  • Don’t know/no answer (DK/NA) (coded 3; 19%)

 

Respondent background characteristics

  • Gender: Male (coded 0; 49%) or female (coded 1; 51%)

  • Age: What is your current age? (mean 50, SD 18, range 18–96)

    Age group:

      18–29 (coded 1; 20%)

      30–39 (coded 2; 14%)

      40–49 (coded 3; 15%)

      50–64 (coded 4; 31%)

      65+ (coded 5; 20%)

  • Education: What is the highest grade of education you completed and got credit for?

     High school or less (coded –1; 27%)

     Technical school or some college (coded 0; 41%)

     College graduate (coded 1; 20%)

     Postgraduate work (coded 2; 12%)

  • Party: Generally speaking, do you usually think of yourself as a Republican, a Democrat, an Independent, or what?

     Democrat (coded –1; 43%)

     Independent (coded 0; 19%)

     Republican (coded 1; 38%)

 

Dam decision alternative question 1 (rotated question and response order; n = 1,582)

Damhydro: In your opinion, is it more important to use dams on New Hampshire rivers and streams to generate electricity, or is it more important to remove dams and allow free-flowing rivers that benefit fish and wildlife? (rotated response order)

  • Use dams to generate electricity (coded 1; 46%)

  • Remove the dams and allow free-flowing rivers (coded 2; 33%)

  • Don’t know/no answer (DK/NA) (coded 3; 21%)

 

Dam decision alternative question 2 (rotated question and response order; n = 1,016)

Damhis: In your opinion, is it more important to keep dams in place on New Hampshire rivers and streams in order to preserve New Hampshire’s industrial history, or is it more important to remove the dams and allow free-flowing rivers that benefit fish and wildlife?

  • Keep dams to preserve New Hampshire’s industrial history (coded 1; 29%)

  • Remove the dams and allow free-flowing rivers (coded 2; 52%)

  • Don’t know/no answer (DK/NA) (coded 3; 19%)

 

Dam decision alternative question 3 (rotated question and response order; n = 1,016)

Damrec: In your opinion, is it more important to keep dams in place on New Hampshire rivers and streams in order to preserve recreational opportunities in lakes and ponds, or is it more important to remove the dams and allow free-flowing rivers that benefit fish and wildlife?

  • Keep dams to preserve recreational opportunities (coded 1; 37%)

  • Remove the dams and allow free-flowing rivers (coded 2; 43%)

  • Don’t know/no answer (DK/NA) (coded 3; 20%)

 

Dam decision alternative question 4 (rotated question and response order; n = 1,016)

Damprop: In your opinion, is it more important to keep dams in place on New Hampshire rivers and streams in order to preserve waterfront property values, or is it more important to remove the dams and allow free-flowing rivers that benefit fish and wildlife?

  • Keep dams to preserve waterfront property values (coded 1; 27%)

  • Remove the dams and allow free-flowing rivers (coded 2; 54%)

  • Don’t know/no answer (DK/NA) (coded 3; 19%)

 

Respondent background characteristics

  • Gender: Male (coded 0; 49%) or female (coded 1; 51%)

  • Age: What is your current age? (mean 50, SD 18, range 18–96)

    Age group:

      18–29 (coded 1; 20%)

      30–39 (coded 2; 14%)

      40–49 (coded 3; 15%)

      50–64 (coded 4; 31%)

      65+ (coded 5; 20%)

  • Education: What is the highest grade of education you completed and got credit for?

     High school or less (coded –1; 27%)

     Technical school or some college (coded 0; 41%)

     College graduate (coded 1; 20%)

     Postgraduate work (coded 2; 12%)

  • Party: Generally speaking, do you usually think of yourself as a Republican, a Democrat, an Independent, or what?

     Democrat (coded –1; 43%)

     Independent (coded 0; 19%)

     Republican (coded 1; 38%)

 

Survey responses shown in codes used for modeling, and with probability-weighted percentages or means (February 2018 poll n = 566; April 2018 poll n = 515; August 2018 poll n = 501).

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