9 27–29 The lack of an increasing trend may, however, also represent selective quitting.
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Smokers' strategies across social grades to minimise the cost of smoking in a period with annual tax increases: evidence from a national survey in England.
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The sentences
The same patterns were found in all three groups of social grade, with decreased consumption levels, and use of illicit and cross-border sources all associated with lower cost of smoking although associations between illicit and cross-border sources of tobacco and cost of smoking tended to be weaker and did not reach statistical significance in the high social grade.