We choose to employ duration models for two reasons.
Specification 2 adds study characteristics: whether the study employed duration analysis or some other econometric technique (omitted: matching), and whether the paper is published (baseline: working paper).
However, most of the studies investigating time estimation in AD have employed duration stimuli in the order of several seconds, that typically require increased attentional and mnemonic demands with respect to shorter intervals [ 38- 40], making it difficult to specifically mark out deficits of temporal perception while minimizing generalized impairments of higher cognitive functions.
Given these problems, the expense involved in such studies and the increased rate of mobility of families that would further exacerbate maintaining contact, nothing comparable in terms of size of the sample employed, duration over which the children were followed up and range of factors investigated has been attempted since the 1000-Family Survey.
The durations of the exposure traces may vary, and we therefore will employ duration-weighted statistics.
However, the majority of timing studies in AD have only employed durations in the range of several seconds, without no comparison with millisecond timing performance.
An early reported human series by Williams and Spence at Johns Hopkins in 1959 [ 10] employed durations from 24 to 72 hours, with good outcomes at both extremes.
Light et al. [ 22], employing a duration-deviant MMN/P3a paradigm, reported across frontocentral electrode regions that significant correlations were observed between psychosocial functioning and MMN (r = 0.62) and P3a (r = 0.63) amplitudes in healthy individuals.
Questions remain about the scale of debt buybacks and exchanges that will be employed, the duration of the bond maturities that would be covered, the assessment of the rate of return on debt rollovers, the amount of collateral that would be required for Greek banks to participate, and the risk-free interest rate that investors would seek as part of a plan.
