市人大代表在讨论会上发言住建局

P4

在三局一公司分供商大会上的发言

在三局一公司首届分供商大会上的发言尊敬的——董事长，尊敬的各位领导、同仁：大家——好！十分荣幸能够受邀参加此次分供商大会，借此机会，首先请允许我代表中建深圳装饰有限公司（以下简称“中建深装”）向三局一公司各位领导长期以来对我司

2018-12-19 4787 0

P7

市农业局法治建设工作总结范文

市农业局 20XX 年法治建设工作总结今年来，我局认真贯彻落实国务院《法治政府建设实施实施纲要（2015-2020 年）》以及省、XX、XX 市的贯彻实施意见，按照市委统一部署，深入开展普法宣传，推进依法行

2020-03-08 3171 0

P822

二建_机电_精讲

复杂，设置缆风绳、锚点困难，难以采用大型桅杆进行吊装作业的基础在地面的高、重型设备或构件，特别是老厂扩建施工。（5）集群液压千斤顶整体提升（滑移）吊装法 1）目前多采用“钢绞线悬挂承重、液压提升千斤顶集群、计算机控制同步”

2019-10-10 9170 0

P52

2013IS实证研究方法的讨论 DISCOVERING UNOBSERVED HETEROGENEITY

Assuming that data in empirical studies are homogeneous andrepresent a single population is often unrealistic in the socialand behavioral sciences, such as information systems, management,and marketing (Rust and Verhoef 2005; Wedel andKamakura 2000). There may be significant heterogeneity inthe data across unobserved groups, and it can bias parameterestimates, lead to Type I and Type II errors, and result ininvalid conclusions (Jedidi et al. 1997). Consider the followingtechnology acceptance model (TAM) example: Aresearcher is interested in individuals’ intention to use an ITsystem or service (Davis et al. 1989; Venkatesh 2000;Venkatesh and Davis 2000; Venkatesh et al. 2003). Informedby existing theory, the researcher proposes a model in whichperceived usefulness (PU) and perceived ease of use (PEOU)of the IT system explain intention to use the system (IU)(Figure 1). The empirical results reveal that PU and PEOUare equally important in explaining IU. However, the theoryand model overlook the two underlying groups: experiencedIT users (Figure 1a, segment 1) and inexperienced IT users(Figure 1a, segment 2). Experienced users show a strongpositive relationship between PU and IU and a weak, or nonsignificant,relationship between PEOU and IU. In contrast,inexperienced users show a strong positive relationshipbetween PEOU and IU and a weak, or nonsignificant, relationshipbetween PU and IU (Figure 1a). In this scenario,drawing inferences based on results from the overall samplewould lead to Type I errors as we would be overgeneralizingthe significant findings from the overall sample to theunderlying user groups, one with a nonsignificant estimate forPEOUIU and the other with a nonsignificant estimate forPUIU. If the model is not refined to accommodate thisunobserved heterogeneity, a system that is unsuitable foreither user group (i.e., one with average usefulness andaverage ease of use) may be provided to all users.

2018-10-13 2272 0