نتایج جستجو برای: im
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Most of previous work on robust equity portfolio optimization has focused on its formulation and performance. In contrast, in this paper we analyze the behavior of robust equity portfolios to determine whether reducing the sensitivity to input estimation errors is all robust models do and investigate any side-effects of robust formulations. Therefore, our focus is on the relationship between fu...
This paper hypothesizes that more active informed trading and intense information production help investors detect the low persistence of accruals, and consequently reduce the magnitude of accruals mis-pricing. Applying both the Mishkin (1983) and the hedge-portfolio tests to subsamples sorted on the basis of a two-way classification – accruals and one of the information production measures, we...
Mises created an artificial construct, the evenly rotating economy (ERE), from which to ascertain the source of entrepreneurial profit and loss. In particular, the ERE is characterized by two distinct elements. First is the elimination of the temporal element, second is the removal of changing market data. The second point necessarily arises from the first. Is it possible that the efficient mar...
A commonly used approach in long-run event-studies is the calendar time portfolio (CTP) approach developed by Jaffe (1974) and Mandelker (1974) and advocated by Fama (1998). For each calendar month we compute the return of an equally-weighted portfolio of companies that unionized in the last T months, where T is either 18 or 24 in our study. The return of this “unionization portfolio” is denote...
رأس x از گراف g را رأس هم احاطه شده می نامیم اگر به ازای رأس y ،همسایگی بست? y زیرمجموع? همسایگی بست? x باشد و گراف g هم پوشش ناپذیر نامیده می شود اگر فاقد یال بوده و یا شامل یک رأس هم احاطه شده مانندx باشد بطوریکه g-x هم پوشش ناپذیر است. نشان می دهیم که گرافهای تجزیه پذیر رأسی فاقد- ( c4,c5)، هم پوشش ناپذیر هستند و ثابت می کنیم اگر g یک گراف خوش پوشش فاقد- (c4,c5,c7 )، باشد آنگاه تجزیه پذیر...
BACKGROUND Intestinal metaplasia (IM) is a precursor lesion that precedes gastric cancer (GC). There are two IM histological subtypes, complete (CIM) and incomplete (IIM), the latter having higher progression rates to GC. This study was aimed at analysing gene expression and molecular processes involved in the progression from normal mucosa to IM, and also from IM subtypes to GC. METHODOLOGY ...
die erlebnislyrik umfasst die gedichte, in denen es um die erinnerung eines lyrischen ichs an ein geschehen geht, wobei mit dem gedichtschreiben ein erinnerungsvorgang in gang gesetzt wird, der einen bezug zwischen dem erlebenden ich und dem geschehen schafft und damit ein unmittelbares erleben erzeugt. die speziellen mittel der lyrik wie reim, rhythmik, klang, melodie, wiederholung, bildsprach...
WExpand@expr_D := Expand@expr . w_W ¦ Signature@wD * Sort@wDD; WM@___, 0, ___D = 0; a_ ~WM~ b_ := WExpandADistribute@a ** bD . Ic1_. * w1_WM ** Ic2_. * w2_WM ¦ c1 c2 Join@w1, w2D E; WM@a_, b_, c__D := a ~WM~ WM@b, cD; IM@8<, expr_D := expr; IM@i_, w_WD := If@MemberQ@w, iD, -H-1L^Position@w, iD@@1, 1DD DeleteCases@w, iD, 0D; IM@8is___, i_<, w_WD := IM@8is<, IM@i, wDD; IM@is_List, expr_D := exp...
Imatinib mesylate (IM) induces clinical remissions in chronic-phase chronic myeloid leukemia (CML) patients but IM resistance remains a problem. We recently identified several features of CML CD34(+) stem/progenitor cells expected to confer resistance to BCR-ABL-targeted therapeutics. From a study of 25 initially chronic-phase patients, we now demonstrate that some, but not all, of these parame...
BACKGROUND c-Kit/α-PDGFR targeted therapies are effective for gastrointestinal stromal tumors (GIST), but, >50% develop drug resistance. METHODS RTK expression (c-Kit, c-Met, AXL, HER-1, HER-2, IGF-1R) in pre-/post-imatinib (IM) GIST patient samples (n=16) and 4 GIST cell lines were examined for RTK inhibitor activity. GIST-882 cells were cultured in IM every other day, cells collected (1 wee...
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