Home > Data and documentation > Innovation Panel > Variables

Innovation Panel Variable

ff_alliwmw4

interwave mailing allocations

Datafile

hhsamp_ip

Variable note:

This variable is part of the "interwave mailing" experiment. See the description of experiments in the IP User Guide.

Value label	Value	Absolute frequency	Relative frequency
missing	-9	2249	76.73%
no incentive, paper mailing	1	187	6.38%
no incentive, e-mail	2	153	5.22%
incentive, paper mailing	3	164	5.6%
incentive, e-mail	4	178	6.07%
	Total	2931	100.0%

Value label	Value	Absolute frequency	Relative frequency
missing	-9	2298	76.96%
no incentive, paper mailing	1	185	6.2%
no incentive, e-mail	2	152	5.09%
incentive, paper mailing	3	167	5.59%
incentive, e-mail	4	184	6.16%
	Total	2986	100.0%

Value label	Value	Absolute frequency	Relative frequency
missing	-9	2333	77.07%
no incentive, paper mailing	1	190	6.28%
no incentive, e-mail	2	159	5.25%
incentive, paper mailing	3	162	5.35%
incentive, e-mail	4	183	6.05%
	Total	3027	100.0%

Value label	Value	Absolute frequency	Relative frequency
missing	-9	7581	91.76%
no incentive, paper mailing	1	189	2.29%
no incentive, e-mail	2	154	1.86%
incentive, paper mailing	3	157	1.9%
incentive, e-mail	4	181	2.19%
	Total	8262	100.0%

Value label	Value	Absolute frequency	Relative frequency
missing	-9	1611	69.95%
no incentive, paper mailing	1	185	8.03%
no incentive, e-mail	2	160	6.95%
incentive, paper mailing	3	161	6.99%
incentive, e-mail	4	186	8.08%
	Total	2303	100.0%

Value label	Value	Absolute frequency	Relative frequency
missing	-9	1675	69.76%
no incentive, paper mailing	1	193	8.04%
no incentive, e-mail	2	169	7.04%
incentive, paper mailing	3	170	7.08%
incentive, e-mail	4	194	8.08%
	Total	2401	100.0%

Value label	Value	Absolute frequency	Relative frequency
missing	-9	3655	83.31%
no incentive, paper mailing	1	195	4.44%
no incentive, e-mail	2	173	3.94%
incentive, paper mailing	3	171	3.9%
incentive, e-mail	4	193	4.4%
	Total	4387	100.0%

Value label	Value	Absolute frequency	Relative frequency
missing	-9	2223	74.72%
no incentive, paper mailing	1	201	6.76%
no incentive, e-mail	2	176	5.92%
incentive, paper mailing	3	173	5.82%
incentive, e-mail	4	202	6.79%
	Total	2975	100.0%

Value label	Value	Absolute frequency	Relative frequency
missing	-9	800	51.58%
no incentive, paper mailing	1	204	13.15%
no incentive, e-mail	2	174	11.22%
incentive, paper mailing	3	175	11.28%
incentive, e-mail	4	198	12.77%
	Total	1551	100.0%

Value label	Value	Absolute frequency	Relative frequency
missing	-9	898	51.67%
no incentive, paper mailing	1	235	13.52%
no incentive, e-mail	2	203	11.68%
incentive, paper mailing	3	192	11.05%
incentive, e-mail	4	210	12.08%
	Total	1738	100.0%

Value label	Value	Absolute frequency	Relative frequency
missing	-9	2037	67.85%
no incentive, paper mailing	1	254	8.46%
no incentive, e-mail	2	231	7.69%
incentive, paper mailing	3	234	7.79%
incentive, e-mail	4	246	8.19%
	Total	3002	100.0%

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	461	31.71%
no incentive, paper mailing	1	260	17.88%
no incentive, e-mail	2	246	16.92%
incentive, paper mailing	3	235	16.16%
incentive, e-mail	4	252	17.33%
	Total	1454	100.0%

Value label	Value	Absolute frequency	Relative frequency
inapplicable	-8	499	30.9%
no incentive, paper mailing	1	279	17.28%
no incentive, e-mail	2	283	17.52%
incentive, paper mailing	3	271	16.78%
incentive, e-mail	4	283	17.52%
	Total	1615	100.0%

Value label	Value	Absolute frequency	Relative frequency
missing	-9	966	41.04%
no incentive, paper mailing	1	337	14.32%
no incentive, e-mail	2	347	14.74%
incentive, paper mailing	3	350	14.87%
incentive, e-mail	4	354	15.04%
	Total	2354	100.0%

What else is Understanding Society doing?

Photo of a child on a tyre swing in a playground.

Insights 2026: Children and young people’s futures

Registration is now open for our Insights 2026 policy conference - book your place

someone leans on a balcony overlooking a lake with trees around it. We see only their arms. Photo by Ümit Bulut on Unsplash

The disappearance of the hump shape in illbeing by age

Lifetime happiness trend changes as youth mental health suffers.

Two people at a table, one instructing the other in book-keeping

Training can boost job mobility and pay growth

New report calls for government and business investment in skills

A family celebrating

Understanding Society Wave 15

The latest wave of UKHLS is now available from the UK Data Service

Email newsletter

Sign up to our newsletter

ESRC Institute for Social and Economic Research University of Essex

The Economic and Social Research Council is the primary funder of the study
The Study is led by a team at the Institute for Social and Economic Research (ISER) at the University of Essex.

Visit our Bluesky Page