Table 1

Descriptive statistics

	Reusable e-cigarettes				Disposable e-cigarettes
Variables	Mean	SD	Min	Max	Mean	SD	Min	Max
E-cigarette sales volume per capita (in log)	−8.74	1.91	−16.03	−5.52	−7.96	2.32	−15.31	−3.77
E-cigarette sales volume per capita	0.00051	0.00069	0	0.00402	0.002	0.0032	0	0.0231
E-cigarette price (in log)	3.26	0.33	2.42	4.41	2.29	0.22	0.78	3.35
E-cigarette price ($ per piece)	27.86	11.42	11.3	82.18	10.12	2.83	2.18	28.37
Cigarette price (in log)	−1.34	0.18	−1.72	−0.83	−1.32	0.2	−1.73	−0.75
Cigarette price ($ per piece)	0.27	0.052	0.18	0.44	0.27	0.061	0.18	0.47
Smoke-free policy	0.62	0.32	0.011	1	0.65	0.32	0.011	1
Cigarette tax (in log)	4.68	0.61	3.43	5.93	4.73	0.65	3.43	6.08
Cigarette tax (in cents)	128	76	30	376	137	89	30	435
Store dummy (1=food, drug and mass stores; 0=convenience store)	0.45	0.5	0	1	0.53	0.5	0	1
E-cig sales dollars (FDM store)	24 830	45 761	22	260 068	39 847	100 897	11	642 833
E-cig sales volume (FDM store)	724	1141	1	6167	4164	10 376	1	65 823
E-cig sales dollars (Conv store)	108 524	93 920	68	537 412	198 918	297 806	10	3 033 058
E-cig sales volume (Conv store)	4688	4129	1	26 236	22 220	33 522	1	335 096
Market population	5 991 489	4 070 396	1 105 923	20 628 688	5 547 356	3 838 943	1 090 263	20 628 688
N	474				569

Not shown in the table: year dummy (2009–2012), quarter dummy (1–4) and market dummy (market #1–market #52).
FDM, food, drug and mass.