The increase in the fraction of part-time contracts in 2005 is due to changes in the survey questions of the Labor Force Survey carried out by the Statistical Institute.
After nearly 20 years with a more or less unchanged design, declining participation rates by certain person groups and new survey methods have required fundamental changes in the survey design.
This might reflect either differences just because of changes in the survey design (the survey conductor changed from 1995 to 2003) or due to fundamental changes in Great Britain's population (for example, the population tends to become more educated and older).
This was a major concern, as marked prevalence changes in the survey population were concurrently observed for both childhood and parental asthma [ 3], and for childhood obesity [ 5].
It was not a trial to determine effects on smoking cessation, nor was it necessarily powered to detect changes in the survey measures.
Furthermore, although Kiswahili is the national language, survey administration may have been modified to meet the dialect in the surveyed region, which could have affected responses; however, our training process and supervision limited changes in the survey based on dialect.
Due to changes in the survey after the pilot survey some respondents were asked different demographic questions – the responses in table one are reported as percentage for all of those who were asked the question.
Although the baseline pretest score in 2001 was somewhat higher than the pretest score in 2000, presumably because of changes in the survey questions, the percent improvement in post-test scores was essentially the same in both years.
Potential changes to EU tariffs, the falling value of sterling, and attempts to reduce costs by sourcing outside Europe were listed as factors behind any change, in the survey published by Barclays this week.
