:: The ITU ICT Development Index (IDI):
background and methodology
3.1 Background to the creation of a single ITU ICT index
Given its leading role in the collection and dissemination
of telecommunication and ICT statistics worldwide, ITU
is naturally well placed to develop a statistical tool that
would allow countries to benchmark their information
societies globally and regionally. With the revolutionary
spread of ICTs during the past two decades, and the resulting
impact on societies and economies, international
calls for monitoring and benchmarking have increased.
At the same time, since the turn of the century the
availability of Internet-related data globally has increased,
making it feasible to construct a composite index that
combines several indicators into one single statistical
value and compare it over a number of years. This is
when ITU’s work on composite indices began.
THE DIGITAL ACCESS INDEX
In 2003, ITU developed the “Digital Access Index
(DAI)”, which was presented at the first phase of the
World Summit on the Information Society (WSIS).2 The
main objective of the DAI was to measure the overall
ability of individuals in a country to access and use ICTs.
It was thus built around five categories: infrastructure,
affordability, knowledge, quality and actual usage of
ICTs. It was based on a methodology that used goalposts
(or upper value limits), which were averaged to
obtain category scores. Categories were then averaged to
obtain the overall index value. The DAI included eight
indicators and was calculated for 178 economies for the
year 2002. Comparative DAI scores for the years 1998
and 2002 were calculated for 40 countries. Although it
was published once only, it received considerable interest
from Governments and other users and showed
that there was a clear international demand for such a
benchmarking tool.
THE ICT OPPORTUNITY INDEX
In 2005, ITU and Orbicom3 decided to merge the DAI
with another index, the Orbicom “Infostate Index”
(also published at WSIS 2003) to create the “ICT
Opportunity Index (ICT-OI)”. The decision to merge
the two indices was taken in order to benefit from the
experiences gained in producing the two indices and
to avoid publishing two ICT indices that were similar
in terms of the data they were based upon. It was also
in response to calls from the international community
and following the WSIS Geneva Plan of Action recommendation
(paragraph 28) “to develop a composite ICT
Development (Digital Opportunity) Index” combining
statistical indicators with analytical work. The first edition
of the ICT-OI was published jointly by Orbicom
and ITU at WSIS 2005.4 The WSIS Tunis Agenda made
reference and acknowledged the ICT-OI as one of the
two indices (the other one was the “Digital Opportunity
Index – DOI”, see below) to measure information society
progress. An updated version of the ICT-OI was
published by ITU in 2007.
The ICT-OI was particularly designed to monitor the
global digital divide and to track country progress over
time and between countries of similar income levels.
Based on the Orbicom Infostate conceptual framework,
which is closely linked to economic theory, the ICT-OI
distinguished between infodensity (including ICT infrastructure
and skills) and info-use (including ICT uptake
and intensity of use). It thus grouped ten indicators into four sub-indices, each of which could be tracked separately
and allowed to identify strengths and weaknesses
in different ICT areas. The ICT-OI adopted most of the
indicators from the DAI. By reducing the number of
indicators from 17 to 10, the ICT-OI could be calculated
for a much larger number of countries (183) compared
to its predecessor, the Orbicom Infostate Index (139
countries). The methodology used by the ICT-OI (and
the Infostate Index) was more complex compared to
that of the DAI. Based on the understanding that the
digital divide is a relative concept, the ICT-OI calculated
values for a reference country and reference year, which
served as the basis for calculating changes in “infostate”
developments. It was thus less designed as a tool for
benchmarking and ranking countries, but rather for
tracking country and group differences across time and
in relation to each other. One of the drawbacks of the
index was that countries could not easily replicate the
computation in order to calculate a national index as it
was based on values of other countries, which would
change for every year.
THE DIGITAL OPPORTUNITY INDEX
Also in 2005, another ITU index, the “Digital Opportunity
Index (DOI)” was developed in response to the
WSIS Geneva Plan of Action call for an ICT Development
(Digital Opportunity) Index. A preliminary version
of the DOI was launched at WSIS 2005, and the WSIS
Tunis Agenda made reference and acknowledged the
DOI as one of the two indices to measure information
society progress. A full version of the DOI was published
in 2006, and an updated version in 2007.
The main objective of the DOI was to measure “digital
opportunity” or the potential of countries to benefit
from access to ICTs. The DOI was based on three main
categories: opportunity, infrastructure and utilization.
Out of 11 indicators used in the index, 9 corresponded
to a subset of the internationally agreed core list
of ICT indicators developed by the Partnership on
Measuring ICT for Development. The DOI included
indicators measuring new technologies, such as fixed
and mobile broadband, as well as price data to reflect
affordability (called opportunity). The methodology
used by the DOI was close to that of the DAI, with
the use of goalposts and absolute values rather than
relative performance, as the ICT-OI. It was thus easier
for countries to replicate the methodology, and indeed
a number of countries used the DOI methodology to
produce a national index.
|