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Volume 59, Issue 11
Meta-analysis of randomised trials of monetary incentives and response to mailed questionnaires
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Meta-analysis of randomised trials of monetary incentives and response to mailed questionnaires
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Abstract
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Oct 2005
111
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68
Nov 2005
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57
21
Dec 2005
28
34
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Jan 2006
26
7
10
Feb 2006
25
8
11
Mar 2006
15
7
11
Apr 2006
23
6
17
May 2006
17
5
4
Jun 2006
8
5
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Jul 2006
15
13
9
Aug 2006
18
7
5
Sep 2006
18
5
13
Oct 2006
11
6
4
Nov 2006
8
14
12
Dec 2006
3
24
12
Jan 2007
7
21
17
Feb 2007
5
27
16
Mar 2007
13
33
18
Apr 2007
21
8
14
May 2007
17
10
8
Jun 2007
9
5
6
Jul 2007
7
3
7
Aug 2007
19
2
6
Sep 2007
22
10
17
Oct 2007
20
5
11
Nov 2007
8
10
5
Dec 2007
6
10
7
Jan 2008
17
3
6
Feb 2008
12
13
13
Mar 2008
8
10
9
Apr 2008
19
4
11
May 2008
11
13
8
Jun 2008
13
10
7
Jul 2008
19
4
5
Aug 2008
16
9
11
Sep 2008
16
6
7
Oct 2008
8
8
9
Nov 2008
10
4
6
Dec 2008
11
4
5
Jan 2009
12
4
5
Feb 2009
10
3
4
Mar 2009
11
8
6
Apr 2009
9
12
7
May 2009
15
1
5
Jun 2009
6
7
6
Jul 2009
10
14
3
Aug 2009
5
7
4
Sep 2009
12
12
8
Oct 2009
23
8
12
Nov 2009
16
3
3
Dec 2009
23
2
10
Jan 2010
13
4
6
Feb 2010
16
3
5
Mar 2010
15
8
7
Apr 2010
17
5
6
May 2010
9
3
3
Jun 2010
14
4
12
Jul 2010
18
4
8
Aug 2010
12
8
7
Sep 2010
17
1
3
Oct 2010
19
0
2
Nov 2010
25
3
9
Dec 2010
9
2
3
Jan 2011
12
5
5
Feb 2011
21
5
2
Mar 2011
12
5
4
Apr 2011
14
1
2
May 2011
9
2
3
Jun 2011
21
2
4
Jul 2011
16
2
2
Aug 2011
15
1
2
Sep 2011
16
8
7
Oct 2011
10
3
5
Nov 2011
15
6
3
Dec 2011
10
16
5
Jan 2012
15
8
17
Feb 2012
10
12
10
Mar 2012
16
5
9
Apr 2012
18
9
8
May 2012
16
17
10
Jun 2012
19
20
9
Jul 2012
17
16
8
Aug 2012
12
15
6
Sep 2012
17
10
15
Oct 2012
21
14
18
Nov 2012
25
11
11
Dec 2012
15
12
6
Jan 2013
23
11
6
Feb 2013
25
10
10
Mar 2013
23
7
8
Apr 2013
21
17
10
May 2013
25
6
9
Jun 2013
5
6
8
Jul 2013
10
9
4
Aug 2013
7
5
8
Sep 2013
6
5
2
Oct 2013
6
3
8
Nov 2013
7
7
11
Dec 2013
0
3
6
Jan 2014
9
4
6
Feb 2014
7
7
1
Mar 2014
13
9
6
Apr 2014
15
9
3
May 2014
23
10
6
Jun 2014
4
13
6
Jul 2014
10
6
4
Aug 2014
10
16
18
Sep 2014
3
2
3
Oct 2014
11
7
6
Nov 2014
11
6
8
Dec 2014
3
2
2
Jan 2015
12
4
5
Feb 2015
1
3
6
Mar 2015
6
3
5
Apr 2015
10
8
5
May 2015
4
4
9
Jun 2015
6
5
6
Jul 2015
11
10
13
Aug 2015
14
3
2
Sep 2015
27
6
7
Oct 2015
7
2
2
Nov 2015
3
4
6
Dec 2015
15
8
3
Jan 2016
9
11
10
Feb 2016
15
1
3
Mar 2016
13
5
11
Apr 2016
6
13
7
May 2016
17
13
19
Jun 2016
7
5
6
Jul 2016
11
3
3
Aug 2016
14
7
7
Sep 2016
25
4
4
Oct 2016
21
7
11
Nov 2016
17
10
9
Dec 2016
15
9
2
Jan 2017
12
5
4
Feb 2017
4
5
3
Mar 2017
14
9
8
Apr 2017
8
15
1
May 2017
3
18
15
Jun 2017
7
9
11
Jul 2017
25
15
6
Aug 2017
9
7
2
Sep 2017
29
19
6
Oct 2017
34
22
5
Nov 2017
46
32
5
Dec 2017
31
19
9
Jan 2018
41
23
14
Feb 2018
40
26
10
Mar 2018
38
24
11
Apr 2018
32
26
7
May 2018
36
26
7
Jun 2018
36
27
4
Jul 2018
35
27
9
Aug 2018
27
17
6
Sep 2018
25
19
8
Oct 2018
27
23
17
Nov 2018
38
25
11
Dec 2018
28
20
2
Jan 2019
40
16
7
Feb 2019
31
22
25
Mar 2019
36
28
9
Apr 2019
48
28
13
May 2019
38
22
12
Jun 2019
19
13
10
Jul 2019
20
13
12
Aug 2019
18
10
8
Sep 2019
14
9
7
Oct 2019
31
13
14
Nov 2019
16
10
13
Dec 2019
31
19
10
Jan 2020
37
17
9
Feb 2020
30
15
26
Mar 2020
32
18
21
Apr 2020
27
23
6
May 2020
30
18
14
Jun 2020
23
15
20
Jul 2020
36
16
11
Aug 2020
35
23
12
Sep 2020
32
20
23
Oct 2020
49
29
27
Nov 2020
46
30
9
Dec 2020
37
20
17
Jan 2021
46
31
8
Feb 2021
38
28
15
Mar 2021
45
27
31
Apr 2021
33
15
10
May 2021
26
22
12
Jun 2021
27
26
20
Jul 2021
22
21
16
Aug 2021
22
21
17
Sep 2021
21
20
10
Oct 2021
39
22
30
Nov 2021
58
28
36
Dec 2021
61
28
11
Jan 2022
38
16
12
Feb 2022
52
27
7
Mar 2022
61
39
22
Apr 2022
76
36
21
May 2022
60
41
26
Jun 2022
73
45
42
Jul 2022
36
24
7
Aug 2022
57
35
16
Sep 2022
48
38
23
Oct 2022
74
62
7
Nov 2022
46
26
14
Dec 2022
66
30
14
Jan 2023
55
35
17
Feb 2023
94
51
13
Mar 2023
83
40
31
Apr 2023
84
33
35
May 2023
80
23
36
Jun 2023
34
14
21
Jul 2023
55
29
17
Aug 2023
41
21
13
Total
4987
2987
2210
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