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Volume 39, Issue 3
There is no paradox with PPI in research
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There is no paradox with PPI in research
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Online download statistics by month: January 2013 to October 2024
Abstract
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Jan 2013
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8
20
Feb 2013
0
9
20
Mar 2013
0
8
9
Apr 2013
0
2
10
May 2013
0
5
12
Jun 2013
25
4
5
Jul 2013
52
3
4
Aug 2013
30
1
4
Sep 2013
9
2
4
Oct 2013
25
5
9
Nov 2013
19
5
3
Dec 2013
29
2
4
Jan 2014
29
11
7
Feb 2014
12
6
6
Mar 2014
22
9
7
Apr 2014
23
5
5
May 2014
26
1
1
Jun 2014
14
0
5
Jul 2014
18
1
2
Aug 2014
21
5
8
Sep 2014
26
1
2
Oct 2014
31
3
7
Nov 2014
27
2
0
Dec 2014
15
0
2
Jan 2015
26
1
5
Feb 2015
29
1
8
Mar 2015
30
2
6
Apr 2015
33
0
6
May 2015
24
0
3
Jun 2015
28
2
4
Jul 2015
19
0
0
Aug 2015
42
2
5
Sep 2015
26
4
2
Oct 2015
15
0
3
Nov 2015
23
2
4
Dec 2015
22
0
0
Jan 2016
32
3
7
Feb 2016
23
4
8
Mar 2016
15
1
6
Apr 2016
21
1
2
May 2016
23
1
1
Jun 2016
39
1
5
Jul 2016
16
5
5
Aug 2016
20
0
1
Sep 2016
23
6
6
Oct 2016
28
1
8
Nov 2016
23
4
5
Dec 2016
19
4
3
Jan 2017
27
2
3
Feb 2017
35
2
1
Mar 2017
18
3
2
Apr 2017
26
4
3
May 2017
34
19
8
Jun 2017
33
10
10
Jul 2017
27
6
2
Aug 2017
45
8
2
Sep 2017
53
3
1
Oct 2017
86
16
13
Nov 2017
98
17
7
Dec 2017
87
9
3
Jan 2018
74
5
3
Feb 2018
67
5
3
Mar 2018
83
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1
Apr 2018
54
4
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May 2018
67
2
2
Jun 2018
61
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Jul 2018
72
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3
Aug 2018
60
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3
Sep 2018
24
4
4
Oct 2018
49
9
8
Nov 2018
66
7
7
Dec 2018
39
1
2
Jan 2019
44
5
1
Feb 2019
42
4
7
Mar 2019
82
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11
Apr 2019
41
1
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May 2019
30
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2
Jun 2019
60
5
5
Jul 2019
42
3
3
Aug 2019
55
7
6
Sep 2019
27
1
3
Oct 2019
25
3
1
Nov 2019
39
2
0
Dec 2019
74
4
2
Jan 2020
34
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1
Feb 2020
26
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Mar 2020
36
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Apr 2020
14
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2
May 2020
25
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Jun 2020
103
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Jul 2020
42
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2
Aug 2020
46
1
0
Sep 2020
76
4
3
Oct 2020
38
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1
Nov 2020
34
1
2
Dec 2020
60
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3
Jan 2021
50
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91
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64
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89
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May 2021
44
7
7
Jun 2021
6
3
4
Jul 2021
11
3
0
Aug 2021
10
3
3
Sep 2021
13
4
2
Oct 2021
31
5
1
Nov 2021
89
9
3
Dec 2021
95
6
7
Jan 2022
87
8
5
Feb 2022
86
10
5
Mar 2022
321
13
9
Apr 2022
81
7
5
May 2022
90
8
7
Jun 2022
64
7
1
Jul 2022
101
9
2
Aug 2022
102
9
1
Sep 2022
81
11
4
Oct 2022
77
9
4
Nov 2022
104
10
2
Dec 2022
100
7
1
Jan 2023
111
4
0
Feb 2023
87
5
0
Mar 2023
204
20
13
Apr 2023
91
11
2
May 2023
107
8
3
Jun 2023
76
5
2
Jul 2023
80
8
2
Aug 2023
99
4
2
Sep 2023
89
3
1
Oct 2023
65
6
1
Nov 2023
149
8
4
Dec 2023
120
7
6
Jan 2024
256
9
2
Feb 2024
110
2
4
Mar 2024
97
9
1
Apr 2024
109
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1
May 2024
109
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1
Jun 2024
100
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Jul 2024
71
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1
Aug 2024
83
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Sep 2024
82
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Oct 2024
146
0
5
Total
7760
682
599
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