The paper systematically reviews existing literature on the relationship between the level of effort to recruit a sampled person and the measurement quality of survey data. Hypotheses proposed for this relationship are reviewed. Empirical findings for the relationship between level of effort as measured by paradata (the number of follow-up attempts, refusal conversion and time in the field) and...

* We thank to the Institute of Household Economy (Kakei-Keizai-Kenkyu-Sho) for providing us micro-level data from the Japanese Panel Survey of Consumption. We also thank to participants at the ESRI seminar. The views expressed in this paper are those of authors' and do not necessarily represent those of the Economic and Social Research Institute or of the Japanese Government. Abstract The 1990s...

Wireless Sensor Networks consist of multiple energy-constrained sensing devices called sensor nodes. Typically, the sensor nodes generate data that must reach a single data sink across multiple hops. The data from neighboring nodes are usually correlated and can be aggregated and compressed inside of the network. This process is referred to as data aggregation and requires the development of da...

The problems of agriculture and poverty cannot be addressed without reducing the number of workers and their families dependent on land, thereby raising productivity. There are substantial rural-urban and male-female differences in rates of labor force participation, employment, and unemployment, as well as informality of employment that exist within and across South Asian countries. Also, most...

Open Government Data often contain information that, in more or less detail, regard private citizens. For this reason, before publishing them, public authorities manipulate data to remove any sensitive information while trying to preserve their reliability. This paper addresses the lack of tools aimed at measuring the reliability of these data. We present two procedures for the assessment of th...

When we have several results of measuring or estimating the same quantities, it is desirable to aggregate them into a single estimate for the desired quantities. A natural requirement is that if the majority of estimates has some property, then the aggregate estimate should have the same property. It turns out that it is not possible to require this for all possible properties – but we can requ...

Determination of the outcome of an IT project in a developing nation is often based on sectoral models and highly aggregated data. This paper offers an example of a replicable methodology to go to the grass roots—the user level—to obtain valuable insights from the individual and group data that are masked by the aggregate statistics.

Firms often carry a portfolio of multiple brands within a product category to target different quality tiers in the market. Furthermore, to satisfy heterogeneous consumer preferences within each quality tier, these firms also offer several variants for each brand. A natural outcome of this practice is inter-brand variant overlap which could occur across tiers or within a tier. In this paper, we...

Many Learning Sciences projects use technology to enhance the cognitive richness of teaching and learning, although few projects investigate the robustness of their approaches across a wide variety of teachers and classrooms. Our Scaling Up SimCalc project has completed experiments in which over a hundred mathematics teachers in 7th or 8th grade used either SimCalc or their existing materials. ...

When individual statistics are aggregated through a strictly monotone function to an aggregate statistic, common knowledge of the value of the aggregate statistic does not imply, in general, constancy of the individual statistics. This paper discusses two circumstances where it does occur. The rst case arises when partitions are independently drawn: in this case common knowledge of the value of...