Both databases have made attempts to improve the quality and comparability of data by providing guidance around methodology, sources, and indicator definitions.
The data source and indicator used will depend on data availability, the purpose of the research (e.g., to provide a community with descriptive data versus evaluation of an intervention), and, in many cases, community support for the research to facilitate access to archival data or cooperation in primary data collection efforts.
The four farm types differed among themselves in terms of all studied parameters including a string of background variables, income sources and economic indicators, showing the efficiency of the classification methodology employed.
These data allowed us to study the impact of data quality on the attribution results, globally and focusing on specific features of the data (number of sources and contamination indicator).
To assess the longer-term consequences of these adaptations, Cooper and Lenski [ 27] employed Biolog™ plates, which are microtiter plates containing 95 different carbon sources and an indicator dye that reflects the amount of respiration on each substrate.
It links to general and official information sources, including statistics and indicators.
Spillemaeckers et al. (2004) proposed a quantitative health and safety indicator to be based on statistical sources and list several indicators (e.g. training, auditing and formal work policy) to measure "occupational health and safety".
An overview of available data source and entrepreneurial indicators can be found in Nijkamp and Sahin (2009).
More examination of how to conduct grey literature reviews should be published and elucidate areas such as sources for reviews, different methods for abstracting data from each source, and common indicators to track.
