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Appendix tables are labeled as replications of main-table columns. Dollar amounts are described as tax-exclusive or tax-inclusive. Standard-error treatment is not visible in the truncated notes.",185 "units_stated_in_notes": true,186 "standard_errors_description": "unclear"187 },188 "figures": {189 "uncertainty_shown": "unclear"190 },191 "conclusion": {192 "bounded_claims": true,193 "policy_implications": false,194 "open_questions": false,195 "restates_contribution": true196 },197 "hedging": {198 "level": "moderate",199 "typical_devices": [200 "'some evidence' for substitution",201 "explicit acknowledgment of external-validity limits of the sample",202 "'consistent with' and 'suggests' for mechanism"203 ]204 },205 "claim_evidence": [206 {207 "claim": "Households in adopting states cut tax-exclusive Amazon spending by about 9.4%, implying an elasticity near -1.2",208 "evidence_type": "table",209 "evidence_ref": "Table IV"210 },211 {212 "claim": "A one-point increase in sales tax lowers monthly Amazon spending by $0.54, implying an elasticity of about -1.4",213 "evidence_type": "table",214 "evidence_ref": "Table IV / Table D1"215 },216 {217 "claim": "Low-income households reduce Amazon spending more than high-income households",218 "evidence_type": "table",219 "evidence_ref": "Table V"220 },221 {222 "claim": "Purchases of at least $250 fall about 29%, implying an elasticity near -3.9",223 "evidence_type": "table",224 "evidence_ref": "Table VI"225 },226 {227 "claim": "Elasticity rises with transaction size",228 "evidence_type": "figure",229 "evidence_ref": "Figure 3; Table VII"230 },231 {232 "claim": "Adopting states did not differ in GDP growth or household income around adoption",233 "evidence_type": "table",234 "evidence_ref": "Table III"235 },236 {237 "claim": "Some substitution toward Newegg but not toward Best Buy",238 "evidence_type": "table",239 "evidence_ref": "Table IX"240 },241 {242 "claim": "Spending decline persists after implementation without clear pre-trends",243 "evidence_type": "figure",244 "evidence_ref": "Figure 4"245 }246 ],247 "structural_summary": "The paper motivates the question with the growth of online retail and its sales-tax advantage, then notes the absence of systematic study of state Amazon tax laws. It presents a novel account-aggregator transaction dataset and acknowledges that the sample may not represent the general population. Section III defends against non-random adoption. Section IV gives difference-in-differences estimates, then cross-sectional splits by income and spending, large-purchase effects, a size gradient in elasticity, and substitution toward competitors. The appendices hold robustness checks: alternative residence identification, removal of the sample filter, tax-inclusive outcomes, alternative elasticity calculation, purchase probability, and income effects. The conclusion briefly restates the magnitudes.",248 "writing_profile_keywords": [249 "policy natural experiment",250 "transaction-level data",251 "elasticity translation",252 "staggered DiD",253 "heterogeneity by purchase size",254 "appendix robustness"255 ],256 "confidence": 0.8,257 "notes": "Section III, which tests adopter versus non-adopter differences, is classified as empirical_design. 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