Bias magnification in ecologic studies: a methodological investigation
<p>Abstract</p> <p>Background</p> <p>As ecologic studies are often inexpensive to conduct, consideration of the magnitude and direction of ecologic biases may be useful in both study design and sensitivity analysis of results. This paper examines three types of ecologic...
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| Format: | Article |
| Language: | English |
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BMC
2007-07-01
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| Series: | Environmental Health |
| Online Access: | http://www.ehjournal.net/content/6/1/17 |