Calculating world normalised Mendeley reader indicators (for multiple fields and/or years)

To calculate the world normalised indicators for the Mendeley readers, select Calculate MNLCS, gMNCS and NPC for a set of Mendeley API results files (multiple files with structured names) from the Reports menu. From the dialog box that appears next, select the Mendeley readers structured names folder containing the WoS/Scopus files with downloaded Mendeley readership information and click OK.  When asked which column contains the number of readers, the answer is the column labelled Readers, which is usually 74. Check this, click OK and then click No to avoid creating a second report.

The top part of the results, for individual files, is repeated below.

World File: Biochemistry Molecular Biology Alcohol  2012
Records                      : 500
Arithmetic mean of raw data  : 16.844000
Geometric mean (95%CI) of raw data   : 7.991652 (7.036911, 9.059811)
Mean(95%CI) of ln(1+raw data)    : 2.196297 (2.084045, 2.308548)
Proportion (95%CI) non-zero      : 0.836000 (0.801005, 0.865871)
MNLCS - mean (95%CI) of world normalised ln(1+raw  data) [population version] : 1.000000 (0.948890, 1.051110)
MNLCS - mean (95%CI) of world normalised ln(1+raw  data)     [sample version] : 1.000000  (0.930197, 1.075041)
NPC - world normalised proportion (95%CI) cited  (non-zero): 1.000000 (0.946767, 1.056227)

Group file: Spain. In set: Biochemistry Molecular  Biology Alcohol 2012
Records   :  193
Arithmetic mean     : 16.663212
Geometric mean (95%CI) of raw data   : 8.162284 (6.598901, 10.047313)
Mean (95%CI) of ln(1+raw data)   : 2.215095 (2.028004, 2.402187)
Proportion non-zero (95%CI)      : 0.808290 (0.746954, 0.857593)
MNLCS - mean (95%CI) of world normalised ln(1+raw  data) [population version] : 1.008559 (0.923374, 1.093744)
MNLCS - mean (95%CI) of world normalised ln(1+raw  data)     [sample version] : 1.008559  (0.911468, 1.110933)
NPC - world normalised proportion (95%CI) cited  (non-zero): 0.966854 (0.893995, 1.045651)

World File: Chemistry Alcohol 2012
Records                      : 500
Arithmetic mean of raw data  : 12.230000
Geometric mean (95%CI) of raw data   : 4.467472 (3.847160, 5.167167)
Mean (95%CI) of ln(1+raw data)   : 1.698816 (1.578393, 1.819240)
Proportion (95%CI) non-zero      : 0.698000 (0.656372, 0.736608)
MNLCS - mean (95%CI) of world normalised ln(1+raw  data) [population version] : 1.000000 (0.929113, 1.070887)
MNLCS - mean (95%CI) of world normalised ln(1+raw  data)     [sample version] : 1.000000  (0.904422, 1.105679)
NPC - world normalised proportion (95%CI) cited  (non-zero): 1.000000 (0.921877, 1.084743)

Group file: Spain. In set: Chemistry Alcohol 2012
Records   :  282
Arithmetic mean     : 9.719858
Geometric mean (95%CI) of raw data   : 4.239215 (3.490230, 5.113132)
Mean (95%CI) of ln(1+raw data)   : 1.656172 (1.501904, 1.810439)
Proportion non-zero (95%CI)      : 0.680851 (0.624327, 0.732514)
MNLCS - mean (95%CI) of world normalised ln(1+raw  data) [population version] : 0.974897 (0.884089, 1.065706)
MNLCS - mean (95%CI) of world normalised ln(1+raw  data)     [sample version] : 0.974897  (0.865313, 1.094329)
NPC - world normalised proportion (95%CI) cited  (non-zero): 0.975431 (0.884203, 1.076072)

The bottom part of the Mendeley API report is shown below. In this case Spain is slightly below the world average for Mendeley reader counts but the difference is not statistically significant.

The mean Normalised Log-transformed Citation Scores (MNLCS) in the table below are the best to use to compare the group overall with the world average if there are multiple different world averages (e.g., different fields and/or years).
For each group they are the average of ln(1+c) values, divided by the world average ln(1+c) for the file (e.g., field and year).
The world average MNLCS should always be 1.
MNLCS values above 1 indicate that the group average is higher than the world average; MNLCS values below 1 indicate that the group average is lower than the world average.
WARNING! MNLCS POPULATION confidence limits below are optimistic because they do not take into account the variability in the world average value.
  - Please use only the MNLCS SAMPLE confidence limits. These are adjusted from the population limits using the weighted average Feiller Expansion calculation.
  - NaN in the sample confidence limits mean that these are impossible to calculate and are effectively infinite.

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Group N     MNLCS L95Sample   U95Sample   L95Pop      U95Pop
World 1000  1     0.940734    1.064616    0.956326    1.043673
Spain 475   0.989 0.913058    1.069826    0.9245527   1.052597
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Proportion non-zero calculations - these are *biased* estimators and should normally be ignored because different fields and years can have different natural proportions of cited articles.

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Group N     PropNonzero Lower95     Upper95
world 1000  0.767000    0.739807    0.792149
Spain 475   0.732632    0.691080    0.770451
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Field equalised proportion non-zero calculations - all group sample sizes are set to the arithmetic mean sample size for sets with at least one publication.

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Group N     PropNonzero Lower95     Upper95     NPC   Lower95     Upper95
world 1000  0.767000    0.739807    0.792149    1.000 0.952902    1.049426
Spain 475   0.744571    0.703499    0.781719    0.971 0.911822    1.033502
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