Study 1

id: Subject number

Condition: 1 (joint); 2 (separate)

Motivation.cancer: 1/7 (1 = not at all motivated; 7 = very motivated)

Motivation.baseball: 1/7 (1 = not at all motivated; 7 = very motivated)

Donation.cancer: 1 (yes); 0 (no)

Donation.baseball: 1 (yes); 0 (no)

Cost.cancer: 1/7 (1 = not at all; 7 = very)

Benefit.cancer: 1/7 (1 = not at all; 7 = very)

Cost.baseball: 1/7 (1 = no at all; 7 = very)

Benefit.baseball: 1/7 (1 = no at all; 7 = very)

Imp.baseball: 1/7 (1 = not at all; 7 = very)

Beneficial.baseball: 1/7 (1 = not at all; 7 = very)

Valuable.baseball: 1/7 (1 = not at all; 7 = very)

Imp.cancer: 1/7 (1 = not at all; 7 = very)

Beneficial.cancer: 1/7 (1 = not at all; 7 = very)

Valuable.cancer: 1/7 (1 = not at all; 7 = very)

age: age of subject in number

gender: 1 (male); 2 (female)

education: 1 (8th grade or less); 2 (some high school); 3 (high school); 4
(vocational); 5 (some college); 6 (college); 7 (more than college)

ethical.bkg: ethical background of subject; 1 (Native American); 2 (White
(Caucasian)); 3 (Black); 4 (Hispanic); 5 (Asian or Pacific Islander); 6
(Other).

income: 1 (under $10,000); 2 ($10,001 to $25,000); 3 ($25,001 to $50,000);
4 ($50,001 to $75,000); 5 ($75,001 to 100,000); 6 (more than 100,000); 7
(decline to answer)

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Study 2

id : Subject number

Condition: string with labels for each condition (Baseball_SE_20 = baseball
separate less expensive; Baseball_SE_50 = baseball separate equally
expensive; Baseball_SE_80 = baseball separate more expensive; Cancer_SE =
cancer separate; JE_50_20 = joint baseball less expensive; JE_50_50 = joint
baseball equal cost; JE_50_80 = joint baseball more expensive).

Condition2: Baseball_SE_20 = 1; Baseball_SE_50 = 2; Baseball_SE_80 = 3;
Cancer_SE = 4; JE_50_20 = 5; JE_50_50 = 6; JE_50_80 = 7.

WTD_cancer: Motivation to help cancer 1/7 (1= not motivated at all/; 7=
extremely motivated)

WTD_baseball: Motivation to help baseball 1/7 (1= not motivated at all/; 7=
extremely motivated)

Choice_cancer: 1 (yes); 0 (no)

Choice_baseball: 1 (yes); 0 (no)

Affect_cancer: 1/7 (1=absolutely negative; 4= neither negative nor
positive; 7= absolutely positive)

Affect_baseball: 1/7 (1=absolutely negative; 4= neither negative nor
positive; 7= absolutely positive)

Cost_cancer: 1/7 (1= not at all; 7= very)

Benefit_cancer: 1/7 (1= not at all; 7= very)

Cost_baseball: 1/7 ((1= not at all; 7= very)

Benefit_baseball: 1/7 (1= not at all; 7= very)

WarmGlow_cancer: 1/7 (1= not good at all; 7= very good)

WarmGlow_baseball: 1/7 (1= not good at all; 7= very good)

Impact_cancer: 1/7 (1=no impact at all; 7= very large impact)

Impact_baseball: 1/7 (1=no impact at all; 7= very large impact)

HelpDiffCause_cancer: (1= do not agree at all; 7= completely agree)

BuyOther_cancer: (1= do not agree at all; 7= completely agree)

HelpDiffCause_baseball: (1= do not agree at all; 7= completely agree)

BuyOther_baseball: (1= do not agree at all; 7= completely agree)

Gender: 1 (male); 2 (female)

Age: age of subject in number

Education: 1 (8th grade or less); 2 (some high school); 3 (high school); 4
(vocational); 5 (some college); 6 (college); 7 (more than college)

Income: 1 (under $10,000); 2 ($10,001 to $25,000); 3 ($25,001 to $50,000);
4 ($50,001 to $75,000); 5 ($75,001 to 100,000); 6 (more than 100,000); 7
(decline to answer)