Does consistent aggregation really matter?

Consistent aggregation ensures that behavioural properties which apply to disaggregate relationships apply also to aggregate relationships. The agricultural economics literature which has tested for consistent aggregation or measured statistical bias and/or inferential errors due to aggregation is reviewed. Tests for aggregation bias and errors of inference are conducted using indices previously tested for consistent aggregation. Failure to reject consistent aggregation in a partition did not entirely mitigate erroneous inference due to aggregation. However, inferential errors due to aggregation were small relative to errors due to incorrect functional form or failure to account for time series properties of data.Research Methods/ Statistical Methods,

DOES CONSISTENT AGGREGATION REALLY MATTER?

Consistent aggregation assures that behavioral properties, which apply to disaggregate relationships also, apply to aggregate relationships. The agricultural economics literature is reviewed which has tested for consistent aggregation or measured statistical bias and/or inferential errors due to aggregation. Tests for aggregation bias and errors of inference are conducted using indices previously tested for consistent aggregation. Failure to reject consistent aggregation in a partition did not entirely mitigate erroneous inference due to aggregation. However, inferential errors due to aggregation were small relative to errors due to incorrect functional form or failure to account for time series properties of data.Research Methods/ Statistical Methods,

AGGREGATION WITHOUT SEPARABILITY: TESTS OF U.S. AND MEXICAN AGRICULTURAL PRODUCTION DATA

The generalized composite commodity theorem (Lewbel 1996) is used to test for consistent aggregation of U.S. and Mexican agricultural production data in each of the categories for which earlier tests rejected homothetic separability. All U.S. agricultural outputs can be justifiably aggregated into as few as four categories. All Mexican agricultural outputs can be aggregated into as few as five categories. The aggregation of all outputs into a single output cannot be supported in either country by sufficient conditions provided by the generalized composite commodity theorem and/or a homothetically separable technology.aggregation, separability, generalized composite commodity theorem, Demand and Price Analysis,

Overture in B-flat

Thesis (M.A.)--Boston Universit

From Conquest to Cognition: 20th Century Exploration Narratives

... Some of the most interesting developments in exploration literature have occurred since 1900. ... The 20th century has witnessed a gradual evolution in the response to this "call of the wild," an evolution that moves through three phases. The first stage ... is characterized by a desire to dominate the wilderness .... the second stage sought a relatively simple enjoyment of the natural world ... In ... the third and most recent stage - the explorer seeks out unspoiled regions for what he can learn from them, for the wilderness teaches him about himself and his antecedents. Three representative travels in the North sharply illustrate this development. ..

Arctic Profiles: Introduction

... The following biographical sketches of men who have shaped our understanding of northern Canada are the first in a series that will run through the next dozen or more issues. ... These profiles make no attempt to be exhaustive, nor are they encyclopedic in their approach to biography. ... The pieces have been written by authors who have a sound familiarity with their biographical subjects; more important, I have searched for contributors who can make significant insights into the personalities of their subjects, and are able to do more than list biographical data that could be found elsewhere. ..